I have actually owned both, a nest and a wifi honeywell. Pros and cons to both. My biggest gripe to nest is that it was focused on saving energy, and did not offer any way to tweak some of the settings. Yes it may be cheaper to let the temp get 3 degrees over what I set it before you turn the AC on, but having 5 degree temp swings every hour is not a very comfortable environment..

The honeywell is simple, but works well. Has a vacation mode, and tells my kids how warm or cold it is outside.. cool!