"Stunning design, software needs work"
(Columbia, MD USA)
Absolutely stunning design. If your thermostat is a prominent device in your home, at leat make it look good with this one.
While the functionality and Cortana integration are great, the UI can sometimes be laggy, with occasional issues getting back to the "home" screen.
However, this being a Microsoft software product, you can expect updates in the near future to hopefully make it more solid.
Out of the box, I would give it 3 stars, but the design is so stunning that I definitely had to bump it up one more star.
Will check back if it improves :-).