I have been using a 303 Laing for several years with zero problems. It is a different model, there is no timer or adjustable thermostat and the check valve, air vent and shutoff are not built in. Mine operates 24/7. It would be possible to use a timer, but I like having the option of instant hot water at anytime. I'm sure there is an operating cost, but it is too small to notice on my power bill. The Laing is an excellent pump in my opinion. I have no information about other brands with everything built in, but there are a couple of other brands that seem to be quite popular as well.