they seemed to have tested time. they lasted a while in production which says a lot. i think they are kinda goofy looking, havn't heard of any major engine flaws though
my brother has 2 of them and they run and ride great I dont love them only because I am used to bein able to throw my blaster around and the warrior is alot heavier and harder to handle but fast cheap and lots of aftermarket
400ex's are very good! A little heavy and not as fun as a modded blaster but worlds ahead of a warrior. I'll probably build a 400ex someday myself......