Leveling didn't take that long but resetting the control did. Didn't get a manual with the unit so I was having to google and utube it. All the instructions said to push the up button five times then the down button five times to set. Could not get any reaction. Finally found one blog that said ten pushes rather than five. That worked.
Also have discovered that I have the Lippert 2.0 rather than the 3.0. Guess Dutchman is trying to get rid of old stock.
As for the out of level being noticeable, it was half a bubble off on the living room floor. Felt like we were walking up hill going forward.