I bought one a couple years ago I will retire it now. It worked ok, but the first cell lasted 3 summers, the second, 1 summer. It's like a cell lottery and I can't support that. I also needed to put around 10 bags of salt each year, plus chlorine to shock, etc. It did help keep the pool clean, but too expensive for me with the hardware breaking down too often. Back to chlorine powder I guess.