The trailer is unapologetically big. Earthrise Optimus Prime looks like a Core Class figure at this scale. Of course, the $1000 robosen Flagship Optimus Prime would get a $750 trailer set (Pulse pricing). The Flagship OP had some issues: cab panel on the back of the head, wrong sounds, no USB-C port, and was not strong enough to handle bot mode on rugs. Despite that, it was and still is a technological marvel to have an Optimus that could transform on its own and have programmable movements. The robosen trailer is massive and even dwarfs Masterpiece trailers. The paint job is again stellar and puts normal Hasbro paint jobs to shame. The robosen OP is not handled at all like an action figure and becomes floppy when the power is off. This trailer is more stable when powered down compared to OP as it has magnets to help keep the large panels aligned and together. There are more parts, however, that require manual handling compared to OP, so it's more of a hybrid playset. It is very impressive how the trailer is able to transform itself, especially in medical bay mode. The trailer also has the correct blaster sounds this time. Roller is thankfully not treated as an afterthought. Roller is quite big and is able to be controlled separately from the the trailer and OP. In terms of negatives, the lack of USB-C for charging and data is again inexcusable at this price. It's now 2023; barrel jacks and USB Micro B should not be used on a 'premium' product. The set comes with 1 charger, but both Roller and the trailer need charging. Our OP needed a recharge as well, so there's 2 chargers for 3 parts. Had to wait a while just to be able to use the whole setup from no charge. The charging and data ports are also not covered, unlike on OP and Roller. Spike's articulation is fairly limited: shoulders, hips, and knees. His face is also blank. The instructions are terrible and do not tell you about the various included accessories or even where they go. The website doesn't explain this either. The battery life also seems rather short; only got through a few hours before I got the low battery warning. The present app has limited functions for the trailer and Roller and is only usable with the Remote Control function; also, the device needs to be able to support 3 bluetooth connections for OP, Roller, and the trailer (current iphones support 7 connections, for instance). The trailer does not store OP's weapons securely. The main problem, though, are the 6 semi-opaque white large supports inside the trailer. They look awful and unfortunately give the trailer a rather 'cheap' look. They are total eyesores. Again, at this price, this is just inexcusable. The promotional material shows clear supports, which would have been fine. There's also one promo pic with a semi opaque support right next to a clear one, which was weird. Painting them silver would have been better than leaving them white. Package Content and Accessories: I don't know what these clear clamp-looking things are for: The 2 silver panels are the shelves inside the trailer. There's a sticker sheet that bizarrely shows a BLUE Roller. There's a coin like what the MP figures receive. There's an Autobot symbol car magnet. The ramp is sadly not built into the trailer and is loosely attached via a magnet. The ramp sides are able to fold to allow for loose storage. The black base piece is for Roller attaching to the trailer. There's also a sticker that shows which # trailer you received. Roller: Roller looks quite nice...and big. The wheels are rubber. The front lights are LEDs, however, the rear fluorescent orange light is not. Spike is able to sit in Roller. The charging port is hidden by a cover on the front passenger side. The back part of Roller flips up to attach to the trailer. Roller is also able to hold OP's Ion Blaster (not shown). There's a spring panel that pulls out to allow the back part of Roller to flip up easier, however, with the black base piece attached, that's not even needed. Roller even makes Voyager OP figures look small. The black base piece allows for a more stable connection to the trailer, although isn't absolutely needed. The rear section rotates upward which shows the dual ports for the dual prong trailer connector. Spike: Our Spike figure had some noticeable warping (nothing a heat gun can't fix). The articulation is very limited. There's a magnet installed in the back. He's a bit taller than POTP Pretender shells. Spike is able to sit in Roller as well as the repair drone. Trailer: The trailer has side support struts that are motor controlled but also has front struts that are manually pulled out. The rear LEDs are red but are too bright for the camera to pick up (they are not actually orange). The wheels are also rubber. Another view. Size comparison with other trailers (top to bottom): Earthrise, MP-10, and robosen. Roller of course is able to the pull the trailer just fine, even on rugs. Unlike Roller and OP, the data and charging ports are uncovered on the trailer. For most trailer modes, it's better to have the motor controlled side struts out. The rear doors are also motor controlled. The interior is LED lit and the drone also has LEDs in the cannons. The side panels are motor controlled. The first time seeing the trailer open was quite impressive...until the awful looking white supports were seen. The upper corners are lined with LEDs. The repair drone cannons have LEDs. The repair drone is also motor controlled. Unfortunately, the axe or Ion Blaster cannot be securely stored here (loosely, of course). I also forgot to install the shelves in most of the open trailer pictures. Spike is able to sit in the repair drone. The gray arm and radar dish have to be manually positioned (and put back when closing the trailer). The black base arm is motor controlled. The drone is able to rotate about 90 degrees to each side via motor control. There's a battle function that thankfully uses the correct blaster sound. This was scary and very impressive seeing the trailer do the medical bay mode for the first time. I thought this was going to fall over on me but thankfully has not after multiple transformations. The medical bay mode will work with either the manual or motor controlled support struts. This is in the middle of transforming. This mode needs plenty of extra space. The repair drone will also properly rotate to the correct position in this mode. This shows the proper placement of the 2 silver shelves in the trailer. For Optimus, the trailer uses 2 of the 4 holes on his feet. Although other OP figures have had the trailer too close to the cab, it would look better if it would at least cover the feet proper. The trailer is able to rotate 90 degrees to either side, although the feet molding may hinder this. Of course, driving OP around with the trailer is a bit of a different experience with the app. There is an "ALL" button in the app in which Optimus separates from the trailer and both parts transform into battle mode on their own. The dual pronged trailer hitch rotates 90 degrees to each side and is on springs. The hitch rotates manually depending on OP's movements. The ramp is disappointedly not built into the trailer. There's a magnet to allow it to loosely attach. There's also support struts under the ramp, which are adjustable. Roller is able to drive up and down the ramp without difficulty. Overall: The trailer will certainly breathe new life into robosen Flagship Optimus Prime and is quite an impressive technological feat in its own right. However, this is marred by the awful looking, large white supports inside the trailer, which make it look cheap. The lack of USB-C is also inexcusable. This is still recommended in light of this and hopefully replacement supports will be made. At least this set uses the proper blaster sounds, unlike the main OP figure. OP case on top; trailer case on bottom. Extra: Can one just remove the white supports? Yes, but then the front and back trailer halves will not align properly, as well as exposing some of the electronics. The supports also have embedded magnets and are needed. Attached pictures of what happens without the white supports. TR10 screwdriver is also needed.