I got the fangs recently and love them.
The only issue with fangs is that now you can actually really potentially injure yourself (or others) if you try to get on it when its not "on". As in, it rolls. The onewheel when its not on and original (fang-less) you tip it back and forth and nothing happens.
But with the fangs, if you tip it the other way (trying to start and you shift your weight to the other side) then if it doesnt start or auto-balance, you tip over, which is then accompanied by it sliding out from underneath you.
1 out of 30 times I start the onewheel thinking its on properly, but it turns out it wasn't and it doesn't auto-balance. But I learned to avoid having a slide-out situation by 1) Rising carefully, more personal control and 2) When the front/wheel-side sets down, I simply dont put my weight too much in the front edge, which is inviting it to slide a bit.