I have used a Nest (gen 1) for many years and recently switched it out for an Ecobee 3 with 3 additional room sensors.

The Nest worked as advertised and I was happy with it. I moved my thermostat location to a higher-traffic area of the house and used Nest Sense to have it automatically determine if I was away. All in all, I was pleased. The only reason I switched to Ecobee was so that I could use my Nest in another home and try something new.

The Ecobee is pretty much the same as the nest. They was you schedule temperatures is to first create Comfort Settings and then you schedule when they should run. It's a little less intuitive than the Nest, but it accomplishes the same task. The additional sensors are a nice touch but I find they are too sensitive. My ~50 lb dog can trigger them, which can run additional air conditioning when I wouldn't otherwise want it to run.