Very good.These guys went out of style before I could collect them all. It works amazing, I'm glad I found this.greatThere's another reviewer in here that gave the Bionicles a bad rating and went on to berate the toys as hard to assemble and fall apart easily. Well I've got a "just turned" 5 year old who has become a raging Bionicle addict. He got a simple Bionicle promo toy from Mcdonalds awhile back and has been hooked ever since. As of his birthday, he now has 7 bionicles. Even though the recommended age group on the containers says 7+, my son has no problem at all assembling and disassembling his bionlces. The instructions are very clear. His favorite thing to do is take 3 of the Bionicles apart and build them together into one big Bionicle.So anyway, I'm not saying my son alone is some kind of Technical genius, I'm really saying go ahead and get your child just one of the bionlces if they are asking for them. If they can put it together themselves and enjoy it, then you can let them get the rest.But beware! Lego is very smart about making money off these things and like my son, your kid will want them all! I'm currently working out a chores for money deal with him so he can buy them himself. (Even the tooth fairy left him one under his pillow once.)I bought this toy and it is pretty durable, but you have to admit it kind of slumps down like a hunchback. Anyways this toy has a moderate amount of pieces and it is not hard to assemble at all. Also it has a ... on each hand which looks like a chain saw. These weapons can be used as skis or swords(I don't care what you do.)The best part about this toy is it is extremely flexible and it does not break as easy as other lego toys.One thing i dont like about the educational value is you sometimes might get the pieces in the right place, but in the wrong way. It also has armor which is awesome and the color and it's mask makes it look fierce and brave....short arms ,ugly fat mask cant attack on skates but cool wepons ps see my others.