Every time I move, I install a hot water dispenser. This is a little higher end than I usually install. It was SO worth a few extra dollars. It works instantly. So far, no boil overs either. 
The only problem was the power cord was too short. I had to hire an electrician anyway because the outlet under the sink was on the disposal switch. I needed an all of the time hot outlet. So, for no extra money, the electrician installed a new outlet. Much more convenient and I can use the extra outlet for other things if I want.