"If you are comfortable, it's level enough for fridge" may be OK for short term camping or parking but I was told by RV service guy, after replacing our fridge, that it's best to use a bubble level on floor of fridge and try to level rig so that bubble is nearly centered when running fridge for long periods of time as when parked in the driveway for months. The Dometic fridge in our 2004 Tioga lasted 10 years with typical leveling and running at a moderate angle in the driveway for long periods. I have read that recent fridges are more sensitive about leveling than older fridge designs.