I've had my JD 530R for several years, with no trouble. The Kaw motor runs great, and the roll bar folds down. The "R" level on JD's gets you a better seat, lights, foot rests, and more. I don't use the "comfort track" or whatever they call the sliding seat track. Bumpy ride? yes, but not too bad. 54" deck and cuts perfect. It cost a bit over $5k, but I like it.