Ive got a 5b SS, and the only thing bad has been all user induced. 10 cartwheels at once and only popped out 1 dogbone that stayed with it. I love this thing. The Losi looks quick on the track, but the 5sc flux is basically a savage with parts available everywhere. That will probably be my next 5th scale. Make sure you get super hard compound tires for bashing. 5b eats them stupid fast, even stock