We have the 4 point on our 29.5BHDS HT that we picked up in February. Been out a few times this season and have not had an issue as of yet and we aren't always in level sites.
From reading here, I always put a couple Lynx blocks under the rear jacks. Haven't had a single error. It has made parking and leveling so much easier and stress free. My DW had a tendency to read the level backwards and add blocks under the wrong side, so this auto level system has relieved some tension.
2016 Jayco Eagle HT 29.5BHDS (ordered 12/30/15, delivered 3/8/16)
2015 F-350 crew cab, short bed, 6.7L PSD, Pullrite Superglide 3300 hitch