Well, let me tell you from experience, you can find my posts in the Owning \ Operating and Kubota Owning\ Operating forms this evening, the only reason I am able to type this now is because of my ROPS, I rolled my tractor this evening and I don't have a scratch because the ROPS kept the tractor from coming on over on top of me, I was not operating on steep ground, just a freakish situation where everything came together at the wrong time, if you fold your roll bar down to get it in your garage, I would suggest you take you take the few minutes it takes to raise it up even on flat ground, strange things can happen when we let our guard down for just a second, I am now a believer in ROPs.