I'm ~20 rides into InsideRide rollers and can still barely ride them (and crashed once when I zoned out.) And these are the 'easy' rollers!
The feel is certainly infinitely better than being bolted to a trainer, but I can only ride them for 30 minutes or so due to being so locked into position. I don't dare move!
Rainy days I use the KICKR for real workouts and the rollers on rest/easy days in a pitiful attempt to get better at them. My dream is to be able to do workouts like I can do on the KICKR, but so far it is slow going.
My wife has also spun thousands of miles on the 1UP USA Trainer, and it is solid for a dumb trainer and folds flat (similar to their beloved bike racks.)