We had that very coach (wonder if the one you are looking at might be our old one) and had no issues with the FlexSteel “leather.” It is actually vinyl, BTW.
The only reason we replaced the coach was to get more interior space and engine HP/torque. In retrospect, we may have been better off if we had kept it. It was a great coach, though slightly underpowered for some of the long, steep, high-altitude grades in the Mountain West. We towed a 2014 Honda CR-V behind it with no issues other than being a little slow on some really hard pulls.
TJ