Everyone has opinions, some valid, some just regurgitate garbage they were told. With that said, I will say this. I have had 2 SWG's, an AquaRite on the pool at my old house, which worked great, but also cost almost 1k. I recently bought a house that had a pool and no SWG, and having been spoiled by one in the past, I will never do without one again. But I noticed they had actually gone UP in price which amazed me. The technology is not some crazy advanced circuitry, it's very basic. So I refused to pay that this time. I bought the brand "CompuPool" off ebay. I was able to get the CSPSC36, which is rated for 40K gallons (even though my pool is only 23k, I like to oversize), for about $600. It has most of the features that the other "name brands" have, including reverse polarity, to clean the cell. The cell is clear so you can see the buildup, and it disassembles COMPLETELY for cleaning, something most others can't claim. I have had it for about 8 months, and it has been nothing but perfect. I was scared at first by the cost, but I can honestly say it was a great buy.