Stabilizers and levelers for Class C are "owners choice" many people like/love them others think they are a waste of money (on a Class C). Personally I had auto levelers installed (HWH) on my Jayco. I am very satisfied with my $3K investment. The choice is yours. We did not have levelers on any other units (2 Class C's and a Class A) and got along just fine. We are older now and appreciate the convenience.
2011 Jayco 31SS V10
2006 Ranger Reata 1850
2014 Jeep Grand Cherokee 4-down