Smooth-- come over and look at mine. DB 60 with Camoplast 25" tracks with the hydraulic flip up of 2 rows.  Couple things that bother me is it seems the tracks "wander" back and forth throughout the field, which is nature of the beast, but makes it tough spraying Pre.  I also don't like turning on the headlands, the tracks don't berm but I had a hell of a time on loose ground the outside wheels seem to get dragged around the corner so they actually berm.  Another thing that is an issue is road time kills the tracks and longevity. It is also very rough on road as there is no suspension. 15mph is pretty rough on it and if loaded (which is not recommended) 10 mph makes for long road trips.  One more observation for the guys in narrow rows: They claim with the cutout in the center of the tracks you can plant in the track.  If it was me I would be not happy with that the gauge wheels will be bouncing all day off of the tread and it sure seems like the center feels pretty tight to me. 18" tracks will work for the 22" guys.  Hopefully there are guys on here that can disprove my theory on that, but that's my opinion.