I'm not sure how well KO reviews are taken here, but I see they've been done before, have they been done with such a bad camera before? Who knows, but here goes.
Incidently, if they are wanted, I will try and take some better pics in due course.
I used to own
G1 Starscream, back in the day, but let me tell you about mine. I got him with a bunch of other TFs (Inferno, Sunstreaker and some others I forget) in a disused ice cream tub for about £2. He had no hands, no missiles, and no launchers to put no missiles in. The reason I'm telling you this is, if I seem to excited about the accessories that come with my new SS, this is why.
So, onto today's purchase. I picked him up at a market stall for £5. Even though he's a KO, I don't think I did too badly. I just wish I'd had money with me when I first saw him Friday when there was also a 'ghost' variant.
Here's the box.

Quite decent IMO. Has bio and stats on the back with a nice misspelling on his motto 'Conquest is made up of the eshes of one's enemies'
Inside the box, he looks like this.

In case the pic is just too bad, included with him are;
Hands, 4x missiles 2 sets of different types. One has already gone AWOL by the time I took this picture. Landing gear that clips into nose of jet. Pretty damn good IMO (But bear in mind I don't know if
G1 Starscream would've had this stuff.
Oh and stickers!

Now I was quite excited to see these, but I have since found out they
suck I don't think they were printed for a figure this size, they rip very easily when trying to remove them from the backing paper, when removed you find out they were stuck to the backing paper much better than they will ever stick to your Starscream. A shame as I liked the idea, and the fact you had a choice of 3 different 'eyes' was good. But I pretty much gave up and just put the Decepticon insignias on his wings.
Alt Mode 
He's actually pretty similar to my old
G1 (except the colour obviously) He's pretty well put together in jet mode. I don't own any other KOs, but if this is typical quality, I'm actually quite impressed. I was also pleased to note the canopy opens.
There is another main difference however. This guy is
tiny so I can't do like I used to with my old toy and put a pilot from an airfix kit in there.
I don't have anything sensible to use for a size comparison, so here he is with
ROTF Voyager Starscream.
Transformation
The basics are the same as
G1. However the tail fins are supposed to pop off and be put back on in robot position, when I seem to remember my old SS simply rotating his. A lot of it does involve pulling something off and re-attaching it in a different position. (wings, missile launchers etc)
Robot Mode 
I know this pic absolutely sucks. But again, very similar to
G1, only very tiny. The arms on mine were quite loose, but everything else was quite decent, although as anyone else who's owned a
G1 seeker knows, articulation aint really their strong point.
Side view
Overall
Todays Transformers toys offer a lot more in terms of articulation and play factor, but for a good dose of pocket-sized nostalgia, these KOs are just the thing.
Again I'm not sure if this is even helpful as a review, and I know I can waffle on a bit, but I enjoyed my little trip down memory lane, so I hope I've shared it on some level.