We had to wait several minutes for the water in kitchen sink to get warm, basically fill a two gallon bucket when I tested. This is very frustrating when you just want to wash your hands or rinse off a utensil. We explored cheaper options like putting a small hot water tank under the sink but even the smallest ones take up way too much room based on the measurements.We elected to go with this small pump unit because of the small size and because it would warm the water to other faucets in the house too. This pump does everything it was designed to do and works as expected. It is quiet and yes we can hear it running under the cupboard but it is not annoying at all. It was easy to plug in because we already had an outlet for a garbage disposal. We bought all new hoses and hooking these up was easy.When I first turned unit on I can hear it humming and working. It kept running and running for two to three times longer than if we were to run hot water out of the tap. It eventually shut off and I realized it just is not as much volume pushing through as if we turned on tap. No big deal at all and I was actually glad it isn’t pushing huge amounts of water through the line. I went to tap and it was immediately ready for use. No more waiting for water! I ran around and tested other sinks and they are all warm too!Now the water doesn’t come out piping hot after a cycle. Our water heater is set to a higher temp than the shut off setting on the pump. I understood this before purchase but the water is immediately usable. If you happen to catch it right after pump cycles it will be warmer. We don’t have a dedicated return line for the hot water so this was our best option and it performs as designed and the best it can do under the circumstances. Yes cold water is warmer now and we have to let it run for about two gallons to get back to normal cold temp. But we rarely go to sink wanting cold water. If we want cold water to drink we go to cold filtered water on refrigerator. So again without dedicated hot water return line there are sacrifices.There is a timer setting on the pump to tell it which hours of the day it will come on. There is a full on position to just run based on temperature of the water to tell it when to cycle and full off position. We leave it in full on.The other style pump from the manufacture has an adjustment to set the water temperature it comes on at. The instructions for this pump talk about that. The instructions say you can only set the on temperature and not the off temperature. So for that I am glad we didn’t spend the extra money on the other pump. This one works great!Edit: Added a smart plug to outlet so we could have more scheduling options between weekdays and weekends and night and day. Works great so far in not running when we are sleeping or letting run all day on weekends, but not weekdays. We can also ask Alexa to turn it on if we happen to be home during a workday and it is normally scheduled off. So there is some energy cost savings with this option.