cheap
needs flow switch mod to allow use with less flow rate
works better with thermobore hose (worked today with it for first time hose doesnt go stretchy and retains more heat)
found unit a little temperamental ,it turns off gas when water flow stops but sometimes doesnt re-light , i think the igniter fires before the gas flow is released and misses it occasssionaly.
a little annoying because if you are out of sight you dont know unitil water goes cold
working with hot water is not over hyped it does make life easier and quicker, but working with warm water is ive found it good at 50 degrees + but seemed pointless below 30 degrees as job needed as much work.
overall opinion is it is good and i dont regret it