One thing that you may not know (and that I found out the hard way) is that the thermostatic servo valves (CPM and their ilk) require a substantial minimum flow to work properly. This flow may be much larger than you want or need. There is (or was) a factory mod kit that supposedly reduced the minimum flow to something like 2.5 GPM from the usual 5 (or something like that) which is still a lot of water. Also, every one that I have ever used took forever to stabilize, particularly at low flow.

I look forward to eventually having a chiller to bring the 71 F well water down below 68 so I, too, can use an Intellifaucet