Top positive review
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It's everything I liked about the Nest, and.
on July 14, 2014
My review is mosty "versus the Nest" because I've had three different Nests and know that one well, and I like this one better.
When my Nest died last month, I decided I was going to buy a thermostat from a company with a history of making thermostats work reliably.
I would have installed this myself, but my A/C guy who installed my system and troubleshot my Nest two years ago ... and then came back and troubleshot the replacement Nest last month said he would remove his loaner 'stat and install whatever I decided to buy.
The one feature of the Nest I knew was hooked on was the ability to change the temp from my phone. Sensi and several others do that now, so I had a few to choose from. In my research I learned that my primary complaint the Nest - that the temperature swing was too wide - was addressed by Sensi's "cycle rate" setting.
I like that the Sensi wall unit operates like a traditional thermostat. Nest's no-button design is cool, but using a thermostat is not a lecture in UX minimalism, and black-and-chrome doesn't really disappear into the background of my home (white trim and all).
The Sensi is actually an easier DIY install than Nest (screw-down terminals vs. push in notwithstanding), and the main thing I would tell other folks is: install the app on your phone first and let it walk you through the installation.
This, Sensi, is what I want in a thermostat. Convenient, reliable, programmable, understandable. I am okay with a modest premium for being Internet enabled. It's half the price of Nest and doesn't intimidate non-technical users. You can keep your auto-programming feature - I always fought with the schedule it created and with two young children we're home most of the time anyway. You can keep your monthly energy usage report - it didn't include enough detail to be useful anyway. And you can keep the space-odyssey design - it might be alright in the stainless-and-black kitchen, or media room, but it doesn't work upstairs.
Granted, we didn't also install a second Nest to have more temperature sensors, and we didn't buy their $200 talking smoke detectors which also report environmental statistics back to the thermostat. But I've got what I need from my thermostat now.
P.S. It took the last Nest two years to go kaput, but I'll update here if that happens to my Sensi.
Update: After about a month I'm still very happy with Sensi. Most people won't care about this but being a network security engineer, I'm impressed that the thermostat has exactly 0 open TCP ports, outbound communication is with one IP, and total traffic is very modest. Nest communicated with a whole bunch of different IPs and was much more "noisy" on the network. Good work, Sensi dev team.