Have been waiting 2 years for the UK version of the Nest and when it arrives it's pretty well useless. I have a 3 zone heating system, two for room heating & 1 for hot water. The Nest thermostat cannot control the hot water + you need to buy one nest kit for each Zone which comes to £432 and you need to retain you original timer for the water bit! Should've been old enough to know better...doh!
Current 2010 5.0 SC Autobiography
Previous 2006 TD6 Vogue SE
Previous 1998 P38 4.6 Vogue Autobiography 50 (No 10)

Thats the thing, the system i have is just one big single zone and the hot water is on demand being a nice gas Combi boiler setup.

For what I need currently it should work well but the proof will be in the pudding as they say! FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

I have just installed tado in my house, seems very good so far and senses when we are approaching or in the house.

Full control via tinternet of heating and hot water