Great product. I have a bathroom that is offline due to the water heater in East Jesus. Rather than drying out small ponds to get hot water in the shower/sink or buying another water heater, I went with this product. mornings and evenings for just a few hours (when my guests are most likely to need hot water for a shower). The pump runs relatively quietly. You can turn it off when you don't need to pump hot water and save electricity. Other: You must call an electrician to install an outlet under the sink. This is not a product defect; just a requirement to benefit from what this circulator has to offer.