I have a Compupool CPSC36. It was installed at the end of the summer of 2010. Since then, it has had to be replaced twice. I first experienced problems when I was seeing widely erratic salt readings on the control board readouts, as well as wacky temperature readings (like 36 degrees F on a 90-degree day), which I noticed within a couple of weeks of opening the pool in 2011. Repeated visits by my pool company could not determine a problem, and the unit seemed to be producing adequate chlorine for our 25,000 pool, so we tried to ignore it. However, when the circuitry on the cell began to MELT, we really pushed things with our company and the manufacturer (see photos of it in the thread entitles "I'M MELTING... I'M MELTING." So we finally got the entire unit replaced -- cell, control board, everything, about a week before closing in the fall of 2011. Then, a week after opening this year (Spring 2012), all of a sudden every display light on our control board was on at the same time, but the LCD display screen was blank. Called the manufacturer, who said this meant the board was bad. They replaced the control board unit. Within two weeks of that, the percentage bars on the LCD unit all of a sudden did not match the percentage output I had selected, with the bars only registering at 10%, but the output set to 30%. No matter how high I set the output, the bars stay the same at 10%. Tested my water, and lo and behold, chlorine production is minimal, with free chlorine down to 1.4 and falling, and chloramines building up. I also noticed moisture building up on the blue plug contact inside the cell housing. Called the manufacturer again; they are sending a whole new cell. We'll see what happens. Needless to say, we are more than frustrated with our Compupool unit, since we have spent the better part of our ownership of it manually chlorinating our pool with liquid bleach!