Product review (5 stars): Outstanding
This unit is saving lots of water.  It is quiet, fast and unobtrusive.
Lots of water was wasted waiting for hot water to arrive from the other side of the house.  I calculate about 800 gallons a month!  This little jewel will back its cost in a few years.
I use the button to turn it on and 25 seconds later hot water is available.  Installation was easy and took about 1.5 hours.