I'll give another endorsement for Cruise RO. I just installed the 30gph model in my boat before heading to Mexico. The owner, Rich, answers the phone and spends as much time as needed answering questions. He helped me make a few changes in my set up that helped the system perform better. Although I originally ordered the auxillary fresh water flush system, I didn't end up using it. Rich refunded me for the unit. I have used the WM for a total of about 300 gallons of fresh water with no problems so far. I love this thing!
I have no commercial interest in this company, I am just a happy customer.
Cheers, Bill