well basically everyone i know that has had a halo, has had to change the board/motor once, twice, thrice or more!
my evolution 2 , had it since like July, one set of batterys, used in 3 tournaments, and campaign with same batteries, not one hiccup or problem with it, and as long as u have vision, it is pletny fast enough. and now apparently the z board ups the speed a bit, which is great and i will be buying it