Our Shasta came with a Serta pillow top but we still found it too hard (so we added memory foam as stated above)
Not because of cheap matress in our case, just firmer than we are used to at home.
2013 Jayco Eagle HT 23.5
2010 Ram 1500 HEMI with integrated brake controller, tow mirrors and Michelins LTX/AT2 275/65R20 max load: 3750 lbs. @ 80 psi but we keep them 50-55 psi