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So the thermostat itself is fine, no issues with the wiring or buttons, looks nice, simple design, whatever. but oh my god. the app. talk about a working nightmare. first, it disconnects from the internet spontaneously throughout the day. no network issue, has been reset multiple times. still continues to fail. secondly, don’t even waste your time making day groups and schedules. something called “peak time savings daily energy efficiency optimization” will consistently override them. i understand the thought process behind it, but there should at least be a way to turn that off. why even bother with a schedule when a program will just do whatever it wants. and lastly, we have two of these thermostats for different levels in our home. the first one turns off immediately after the temperature changes to what it’s set at. but the second one will continue to run for 10-15 minutes after it’s been turned off. even with countless tinkering and trying everything, there is a HUGE delay. overall, it’s fine. i guess. edit; i’m changing my review from 2 stars to 1. since the newest update i can no longer keep it connected to our wifi. basically worthless now. should’ve just gotten a nest.

I have have Sensi installed since last fall. It had been working flawlessly, until it’s summer and I was ready to switch it from heat to cooling. I am now getting a wild ride! Turned on cooling, it adds a “OEP” or “Smart Home Rate” schedule in the cooling section. Inside it, in a few hours it creates a day group for the current day, while all other days in the week are in a separate group. You wouldn’t care about this, except that the single-day group goes to 15c (60f)!!! We woke up at night because the AC is working so hard and it’s getting so cold! I turned off the thermostat, restarted, and deleted the single day group, and overnight the 15c (60f) magic comes back! After multiple tries, now I have to turn off the system before going to bed. What a nightmare! I happen to have two Sensi thermostats for two floor level, and both dance the same tune. How frustrating!

I’ll start by saying I got my thermostat free from my local municipality. If the thermostat you’re replacing is an old ‘set it and forget it’ wall dial this will be a huge upgrade. I’m not going to get in-depth with its features other than to say you can control this thermostat with your smartphone anywhere on the planet as long as your thermostat has connectivity to your home wi-if. Now with that said, in regards to connectivity issues voiced in other reviews; yes, it will occasionally lose connection to your home wi-fi. I’m not a network expert. I can’t explain why. I can understand how this immediately throws people into a tizzy. It’s been my experience however that if you just let it be it reconnects itself automatically, usually in less than a couple of minutes. Your experience may vary, again I’m not a network expert. It doesn’t happen often enough though for me to warrant immediately panning it (‘one star!!! This things garbage’). I’d say 95% of the time it opens immediately on my phone. It’s a small gripe for me and the specificity you have in setting heating and cooling schedules outweigh it. Now for the big gripe. After you sign up for this app the your junk mailbox will increase by 40+ messages a day. No joke. Nothing is ‘free’ I guess. Be warned.