i have a SpectraPure MaxCap UHE 100 GPD RO/DI System for my water and it has worked perfectly for over a year, I changed the filters not too long ago except the membrane as it is supposed to last 3 years. there is plenty of water pressure and i removed the first filter to make sure it refilled...
Very pleased with the product and customer service. I messaged @Bruno516 about purchasing a unit and he asked what I would be using it for and I sent him the results of a water test I had done on my tap water. He then recommended a unit that would fit my needs. He built the unit the way I wanted...
Some links below showing the details on the units and setup.
https://www.aquaticlife.com/ro-di-systems-and-cartridges/aquatic-life-ro-buddie-3-4-stage-reverse-osmosis-deionization-systems.html