First off, the size.  This dude is as big as a Mega.  I do not lie.  Now, if I hadn't gotten him at KB, I could have actually paid the deluxe price for him, but as it was I paid about what I'd expect for a toy this size.  Still -- big.  And I think I know why.  There's not a lot to him, and as a result he's really solid.  I mean, REALLY solid.  But enough of that.  One thing at a time...

Vehicle Mode:

He's a pretty cool looking tank thing.  Strangely enough only one set of the missiles actually fires -- the other side is just for storage.  I guess that's not too terrible since you need the Mini-Con attached to fire those missiles anyway.  You stick the little guy onto the peg and the missile array pops out a little.  Pull back, and they fire.  Neat?  Well, as with Powermasters, I never really was a fan of a feature that you could break if you didn't handle it right.  Try and transform Optimus Prime from a truck to a robot without Hi-Q, and you'd break the little latch that kept his legs in place.  Same thing here.  You can pull back on that firing switch all you like, but it won't move unless the gimmick breaks.

The Mini-Con can do some interesting stuff.  He attaches to the front and can be fired out by pressing a switch in the back of Demolishor.  There's also a seat back there where the little dude can sit in either Vehicle mode or base mode -- a little reminiscent of the G1 toys that came over from the Diaclone line.  The little Mini-Con is cool in his own right.

Base Mode: Well, there is a base mode, but it's ugly and pretty much pointless.  Moving on...

Robot Mode:

The transformation is pretty straightforward, and I like how the treads come together to form the robot legs.  That being said, I think they could have done better in a few spots.  The arms and legs have vertical movement, and that's it.  No lateral anything.  He has "hips" so to speak, so the legs can come out a bit, but the shoulders only move in one dimension.  Likewise the knees and elbows.  It would have been easy to add some lateral twisty movement to the elbows, but alas there is none.  The head doesn't swivel, which annoys me to no end.  The torso is pretty mobile, however.  And one nice thing I like (and this is more for the kids) is that the chair of his Vehicle mode can be used to hold the guy while you're bashing him against another character.

In short, he looks neat, but he doesn't do much.  I really like the way the Decepticon symbol is molded in, and the glossy-ish paint on the chest area is a really good substitute for flaky chrome paint.  Despite the lack of movement, design in both modes is solid, which is expect was due to the fact that little kids are supposed to be playing with these things.  But what ever happened to joints that are designed to come apart if excessive force is applied?  These arms could snap off at the elbows quite easily, and then you're screwed.  So, all in all, good ideas, but some of the design could have been better thought out.

Oh yeah, and he has four places to put Mini-Cons.