This is why I purchased the Honeywell 9000 WiFi Color Touchscreen Thermostat[0] instead. The nice thing about the Honeywell is that you can use it completely offline if you so choose. It also has a REAL interface, so an app is an optional extra not a required component.
Both the Nest and Honeywell require the infamous C wire, both are similar installation, and both cost around $200.
PS - And, yes, the Nest has a theoretical setup without the C wire, but you'll lose key things like fan control, or if the boiler doesn't run enough the entire thing can die. On both it is ultimately C wire or don't waste your time.
100% on the same page as you. I didn't get the Honeywell, I actually got a relatively cheap z-wave thermostat that acts like a regular ol' dumb programmable thermostat that can also be controlled by ANY z-wave compatible home automation hub (I use the Wink hub, to my sometimes chagrin).
Both the Nest and Honeywell require the infamous C wire, both are similar installation, and both cost around $200.
[0] http://www.amazon.com/Honeywell-RTH9580WF-Touchscreen-Thermo...
PS - And, yes, the Nest has a theoretical setup without the C wire, but you'll lose key things like fan control, or if the boiler doesn't run enough the entire thing can die. On both it is ultimately C wire or don't waste your time.