I have been extremely pleased with my QuikChlor SWCG. One thing that is important to remember, having a SWCG can make you a little complacent about checking chlorine levels. You still need to check your chlorine at least weekly (I check my chlorine & ph Wed/Sat) as your SWCG will need to be adjusted occasionally. As an example, in May a setting of 40% worked fine; June it had to be kicked up to 60%, and July to 72%. We are having an extremely hot and very sunny summer this year. Last night I just readjusted to 65% as the monsoon season brings alot of cloudiness, and less chlorine is lost. My pump run time is 8hrs, FWIW.