Bests & Worsts Reviews from Amazon

After reading other reviews, I bought this unit to go under my kitchen sink, which is far from the hot water tank. I never got hot water at the sink before. The unit is small enough to fit under the sink, even with all the drain lines and waste disposal to fit it around. I already had a plug at the back of the sink cabinet, so I did not need to do any electrical work. The unit is working great. I set it's temperature half way on its scale and in 3 1/2 minutes the red light turned off and I had very hot water in the sink. So, having just installed it, I think this unit provides a good solution. However, I gave it only 4 stars because of the difficulty in installation. I would not have been able to install it without the help of others that commented on the unit and provided further instructions. There are NO instructions with the unit. To help others, I am providing some further details on the actual install that I did. Hope this helps save you some time. Where the hot pipe comes into the sink cabinet, after the shutoff value, I disconnected the hot line that went up to the faucet. That line needed to be connected to the input on the heater and then, the heater output gets connected to the faucet. The problem is that the unit has 1/2" connectors and the hot line and faucet are 3/8". I first got a 36" faucet connection cable with a 3/8" compression end to attach to the hot line at the valve, and a 1/2" FIP (Female threaded) end to attach to the heater. This in itself did not work for me. The 1/2" attachment has only a few threads to grab onto the unit's connector (a male 1/2" plastic thread), and it is not enough to get a good connection. I had tried, even using 7 layers of Teflon tape, as another user suggested, but that was not enough. It leaked. You need a deeper threaded connection. At Lowe's Hardware, I was able to find a 1/2" female to 1/2" female Brass Pipe Coupling, and a 1/2" Male (both ends) Brass Pipe Hex Nipple. That allowed me to thread the Coupling onto the unit (after 7 wrappings of Teflon tape), and then thread the Nipple into the coupling (7 more wrappings). This gave a much better threaded connection to attach the hose to. I used Teflon tape on that as well. First screw down the Coupling until tight on the unit. Then screw in the Nipple until tight on the Coupling. Then attach the Faucet Connection hose til hand tight and then tighten one half turn more with a wrench. That did the Trick. No leaks. Do the same on the output side that goes to the faucet. For the overflow, I used PVC pipe and ran it into a bucket. If there is ever an overflow, the bucket will collect it. I am not a plumber, just a homeowner. If someone else out there can add to (or correct) what I did, I welcome that.