Definitely B&W Companion for me. Mine has worked perfectly for almost 5 years with never a problem. When I don't want it in the bed -- completely gone with flat floor in minutes.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof