After spending heaps of time researching the best reverse osmosis systems we discovered the purotwist (omnipure) system, This is a fantastic unit thats sturdy and made in the US. Installation was a breeze and had it all hooked up in about 40 mins. The water thats produced tastes great and there is minimal waste. Would recommend. P.S. Also bundled a three way mixer so i didnt need to drill another hole.