I am thinking of purchasing a ZTR next year but have heard alot of people around my area put them down because in East TN, we live in the mountains and hilly yards are quite common and people say that they are too dangerous on hills? I could see where they could be dangerous but then again anything is depending on how someone operates it. I just would like some Pro's and Con's from guys using them on lawns with hills or banks. I know hustler makes a special model for hilly conditions. And i would imagine a roll bar would be a good idea if im looking to purchase ? Any advice would be great!