A buddy has the
Nest Thermostat and he swears by it. Can change temperatures from your phone. He loves it. Visually appealing too.
He's with Sunlife, and apparently all/most of the cost was covered by something in his plan that covered home improvements (or something like that).
When my wife is gone for work (multiple days in a row) I keep mine at 15 and I think that's totally normal. I walk around with at t-shirt and no socks. I always ask the kids how they are, and they never complain.
When she's home, she pops it to 20ish and I can't stand it. She also wears a t-shirt though and wont meet me half way and at least wear socks and a heavier shirt.
The only place we agree is at night, when she brings it down. I despise sleeping when it's to hot.