When I first laid eyes on him through his box's window... I just stared for awhile... mesmerized... in awe... my first words were "you sexy beast!... omg you're finally mine!!" I got him the same time I got metroplex, so I opened both of them up right away just to get them out and put their boxes away. When I came back from putting up their boxes, I stood them right next to each other. Wow. Metroplex's head is higher off the ground than Primus' is! Primus is taller over all though, and a LOT bulkier, and that's not including the planet kibble either, so I don't feel gipped at all by the supreme price tag. the amount of details on this guy... and weapons.. is just plain staggering! his articulation is awesome as well. I like his hands better than Unicrons... the articulation is the same, but the way they're sculpted is much nicer and more realistic in certain poses. Unicron's head is just BARELY larger than the one on the actual bot... the face and horns are identical too! the face is colored with a darker grey, and his horns aren't yellowgold, but he is dead so thats how it should be. I currently have primus posed holding the head by the one whole horn, standing next to unicron with his head folded back, and on his knees looking nicely decapitated! He is actually pretty easy to transform, but the transformation is complex enough to feel satisfying. my only complaint is I wish you didn't actually NEED to use the chipsquare, but you do, so don't ya dare lose it! Primus gets an EASY A from me. CLICK ON PICTURE TO SEE NON-CROPPED FULL SIZED IMAGE!!