I wanted this strictly for MC and the Railgun, while the collectible Helmet makes an excellent desktop addition.
For kids, this is a great economical way to introduce them to Halo MegaBloks as the helmet can act like a carry case in the car "in theory" and the micro-vehicle is a great alternative to giving a 4-5 year old a full blown Warthog only for it to be dropped into a gazillion pieces.
My only complaint is MC's color. You can clearly see he's not his usual H4 color, as the Helmet is.
So if you want to a true MC with Super-Articulation, better look to the RC Mantis or the Broadsword sets, though their colors might be off too.