I don't have one myself but know two people that do and they LOVE it as a last rinse step before you dry.
Washing your cars entirely from start to finish may get a little expensive as you'll blow through a lot of water and as a result buying new filters sooner.
Going on year 2 with my CR spotless and it's awesome! For good measure I follow up with the master blaster to blow out residual water but the CR spotless system is the bomb!