I bought this thermostat because I trusted the brand name and wanted something sleek and low profile.
It is good but it makes, what I consider to be an awfully loud noise when it clicks on (and off). To give you an idea of how loud it is, we can hear it click from any room in our house, even with the internal doors closed. If you're a light sleeper - it will wake you up if it comes on at night. I did email Honeywell support about this thinking it could just be a faulty unit, however after some further research it turns out that this is how it was designed - I never heard back from Honeywell support either.
One other point to consider, this is branded as an Eco device which to a certain extent it is. The issue i have is that this is a manual setting, not an automatic one. So unless you want to be 'interactive' with this unit I'd suggest not paying the premium. Furthermore it does require batteries, if the batteries run out whilst you're away the unit will not work; although this is true for any of the LCD type thermostats.
I'm going to buy a plain 'ole simple unit that does not make a loud click and requires no batteries. They are much cheaper and more reliable. I think it's only fair not to buy a Honeywell unit either - I like to know that if I encounter a problem; there is technical support available.
Of course, if you really do want to buy this unit; I'd recommend a set of Ear plugs too. :)