I looked at one, and my impression was that is really wasn't useable for us unless the loft was up, so;
1) in the rain????
2) in the heat, added AC load
3) in the winter, added furnace load
given typical western oregon weather it didn't make much sense for us.
But I have to give Keystone and Outback credit for being inovative and giving it a try.
2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!