If you think about it logically the frig seems to work fine for most people driving down the road and when they stop and leave their rig parked for a short period. No one seems to be too concerned with checking to see how level it is during those times. Likewise a lot of people overnight in WalMart and other parking lots without being perfectly level. So in most cases eyeballing it works fine. For me being perfectly or at least close to has more to do with how it feels to me especially while sleeping. I also don't like things rolling around the counter top.