My daughter's catalyst doesn't dart. I have hard surfaced wear bars on it. Maybe different trail conditions. I didn't find anything i disliked. Maybe the running boards. I liked them but i broke them. Definitely not strong enough. They don't seem to slide around anymore than any other sled, which amazes me. We were riding on a foot of fresh with a slick layer below and bottomless under that. Everyone said it feels tiny. It feels like a sled to me. People griping about belt drive whine. Another nothing there. Gets even quieter when on gas. Bottom end is nothing to write home about. After that it runs great but I'm no 600 expert. Definitely rides better than ascender alpha, which was the worst ride out there on the trail. Steering ease is great but thought it would be better. Definitely needs better shocks but it's fine for my daughter. 24 155 9r with 325 felt like a boat anchor compared to catalyst when playing on steep sidehill. Didn't even want to ride 9r after riding catalyst. Wasn't sure what i thought of it, for most of the day, until i switched to the 9r. Then i was like wow. Just so you know i love the 9r. People talking about ski pressure. There is something there but have played with nothing. It sort of feels planted but it's not. Not sure how to describe it. Definitely an awesome sled. Goes anywhere anyone else did in this snow.