My thoughts:
If I had a reliable, local, experienced dealer ( whom I had faith in), I would consider a
CDS unit. It seems to have proven itself over time and under normal operating conditions to be a reliable system. However, I don't have a reliable local distributer, and like most experienced cleaners here, I don't operate under normal operating conditions. I like the room it provides (and wouldn't want to blow half that room with a CNG tank), but don't want to have to limit my flow down to 6 gpm in order to get 220 degrees at the pump. I demand that temp with 12 flow.
As far as I can tell, there is no van operated system currently being made that meets all of the requirements of space savings, balanced heat and flow and proven reliability.