We cut very hilly terrain with ours. Just takes a little practice and those hills become no big deal. I do have one property where its difficult to cut up and down the hill, but I can cut alongside the hill no problem.
On rough areas, its mixed. The 7ga deck is tough enough to take tough grass, roots, etc. but without bar tires, you’ll get stuck-pretty much like a 4x2 tractor with rear turf tires. One thing for sure is, its less tippy than a tractor. Not good on mud, but who cuts a lot on mud?
For a few years, I ran bar tires on my zero turn and it made a huge difference on hills and trails. Then when I needed a second machine, I bought a 4WD mower and switched back to turfs on the zero turn.
You know your terrain better than anyone, but dont worry too much about hills. We cut along them easily, even with turfs. Up and down is not as easy, but still doable.
With bar tires, it‘ll climb just about any hill and they are extremely stable.
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