I've parked on slight inclines and declines that were level and were also tilted and all the doors had no problems. Also the front doors have quite a bit of resistance and stayed open easily in all the conditions. It's not so much resistance that it makes them hard to open or close manually, but it enough to keep them from moving, which is very nice on a slope or hill! The auto present feature has not been affected by the inclines or declines I've been on so far.
I'll eventually make it over to Seattle where we have some very steep hills, so if the doors do well there, the should do well anywhere!
