Buttons on old thermostat were starting to be erratic. Decided to go with Nest thermo e, operation appeared to be simple. Installation was fairly simple. Wasn't really interested in schedules because really don't have one. Cleared the pre-installed schedule use as adjust when needed. Put app on wife's phone and now she does not have to tell me to turn the AC on or off.
The Nest E makes our home reliably comfortable. I was surprised at how attractive the unit is. Its unobtrusive appearance allows the artwork on our walls to stand out. After I figured out how the menus were set-up the programming went very quickly.
Setting the schedule is a little difficult. The scale either needs to bigger, i.e. more movement for each degree/time or the ability to type in what you want needs to be added. Other than that it is very good for what it is designed to do.