I have this unit and it has worked perfectly fine over the last year. I think there are several people with this unit in the club. Water out of the DI is 0 tds and water out of the RO is 2-3 tds. I have used it for a year and will be chaning the filters this week.
I have the Air Water Ice. I bought it 2nd hand & replaced the DI after over 2 years. I wasn't sure on the color, it may have lasted a lot longer. But with setting up the 125g I wanted to make sure I had fresh filters
I also added a whole house sediment filter. I did this after having a faucet leaking after junk was stuck in it
When I get a larger tank I will probably buy a 2nd unit, or modify this one