The RO buddy is finicky, uses proprietary filter sizes, leaks, is inefficient (50 gallons of water resins exhausted, not all resins are created equal).
When I first got into reefing I decided to buy the RO unit first. A lot of people suggested
BRS, but their system needed assembly, and I noticed a lot of people adding on to them and having issues with how to add to them. So I already knew I wanted a five stage to prevent needing add on later.
Also, people complained about TDS in the water after filtration and I learned about PSI and how that effects filtration, so I knew I needed a pressure meter.
Then there was talk of flow restrictors and TDS meters, so I knew I would need a flow restrictor cut to the right size and a TDS meter. So I started to piece together my RO unit and found it utterly overwhelming. Frankensteining a system was NOT something I was enjoying. I wanted all the features just already built into the system.
So I googled the "best ro system" and Spectrapure pulled up. They are out of Phoenix, AZ. They are the leaders of RO/DI systems, the creators of reef ro/di and are amazingly knowledgeable and helpful (I called them before buying). So I bought their 90gal a day five stage ro/di, with two built in TDS that show me the TDS at EACH stage of filtration, and built in pressure gauge that allows me to see I have proper flow and also reminds me I still have water going. The restrictor was built in and already cut for my system, and luckily I didn't have to make any changes. It came FULLY assembled with a detailed manual. It cost $399 dollars. Yes its more expensive, but I have had it for 6 years changed the membrane once, the silica buster twice, the Max Cap three times. It is paying for itself in savings. Also, the waste water to ro water is amazing. I have good pressure so that probably helps. Now that I have the best system I can not imagine using anything else. Most people don't hear much about Spectrapure because there is no reason to post about them. They don't fail and are fool proof.
Comparing the RO buddy to Spectrapure is like talking about the Pinto versus a Cadillac. Sure the
BRS and other no namers sold by others, I suspect they are all the same manufacturer just re-branded, are like hondas. LOL!