The xm is working great, side by side to my friends pro I think the xm is smoother at carving, tight donuts are easier. (we do have to adjust the pro a little more and ithink it will be as smooth as the xm)!! Feels like a standup jetski in some aspects. Just heard someone put a rail through the track windows possibly cause of a loose track, hope that doesnt start happening because this sled is sweet.