I have never been a fan of Union in general but i must say just from looking at the Altas they are a solid binding. THe bosses and cartels are great binders as well. You really can't go wrong. If your more into jibbing/jumps i would get the bosses if your more into mountain shit the cartels might be a better fit. Can't speak for the altas because i haven't ridden them but they seem to be a good do everything binding.