I used the Prod. unit on several vehicles, now have a 2015 Ram with factory integrated system and IMHO, that's the only way to go. It seems to operate much smoother, has better adjustability, and I have many less bumps/cuts on my knees as I enter/exit my truck. Over the time you'll have the truck, the extra $200 is really a minimal amount of $$ for the service and convenience of the factory system.
Days camping (2015)----88 days
Days camping (2016) ---110 days
2016 Wildcat MAXX 28RKX (33' TT), 2007 13' Scamp
2015 Ram Laramie Hemi
30 years RV'ing
12 different RV's