I bought 4 of these units for a renovation. After some issues with setting them up (see below if interested) they are working fine with Google Home (with some caveats).
TD;DR They work, but I'm not 100% happy with them. Not quite a mature product, yet. Review composed in novella format.
The devices are attractive and let you set the display brightness which is great and you can even have the display off when it isn't being interacted with (no clue on the wake/sleep time on that and haven't tested yet).
As a stand-alone thermostat you use manually I'd say steer clear. There are no buttons, it's a solid surface with two capacitive zones (for up and down). The results of tapping are unpredictable. Tap 3 times you could get 0-3 touches recognized. Seems they have made sure it doesn't recognize single touches as more than one (important as overshooting is more frustrating), but it just doesn't react like you'd think it would. Holding to reach a temperature is unpredictable as well. It will pause rather than change at a steady rate (e.g. like setting the stove temp or timer). My finger is solidly in one place and yes the protective plastic is off. It's strange and mildly annoying. A nob is a much better interface or physical buttons (like 7-day programmable I've used in the past).
Setup woes: I set up all 4 one after another. Hold up and down, wait for it to indicate it's ready to pair, then go through the steps on the app. All painless and quick. After the last unit I selected "finished" (no more to add). Then the app crashed. I re-open the app. Crash. I clear the cache and data from the app. Launch app fine, enter login info.. crash. Reinstall app. Crash. Installed on a different Android device and OS version.. crash. Apps shouldn't hard crash with zero feedback except in limited circumstances.
Support: This company is based out of eastern Canada and so is their support. They only do support via email and depending on the day they close up shop by 3pm or 4:30pm (EST). I was setting up at 1pm PST which meant I had to wait until the next day for a response. Had I known they wouldn't have any supper I would have waited and installed early the next day. Support is friendly and responsive once someone is assigned, but not having support during normal business hours for all of North American is pretty bad. They can't hire one person on the west coast to answer some emails?
Turns out the app ended up working hours later with no direct intervention (i.e. well before support responded asking whether I was on the latest version of the app). Best guess is something hadn't completed on the backend and it was sending something unexpected or incomplete to the app after logging in. Support had no explanation for what I encountered, which is not reassuring.
Other nitpicks:
From support: "Zones aren't currently supported in Google Home at this time." They don't state that on the website and in fact they state, "*We suggest naming zones by room name. " But the only way a "zone" will work is if you have multiple thermostats in a room (because Google recognizes a room not the Mysa zone). So if you want a bunch of thermostats (like a floor of your home) to be changed at one time you'll have to put them into one room in google home rather than the room they are actually in. Seems this would be an easy fix by Mysa creating a virtual device for each zone (and this is how some other smart devices handle zones and programs). In any case I have it working with reasonable voice commands and it appears to work reliably.
Once I got through the setup issues the app has been fine. I don't agree with the critiques of it being ugly and I'll take ugly over unreliable. I'd assume most people will interact using Google home, Apple HomeKit, Alexa, Smartthings or what have you. Mysa must have an app, but most people are going to interact with the devices using their smarthome platform. Use the app for setup and your smart platform for interacting.
There is no webapp. You can't even view how many devices you have set up from the Mysa website which I found strange. With the app crashing I could have at least checked whether the devices registered correctly. If they built their iOS and Android apps cross platform having a webapp should have been trivial (e.g. using Ionic, PhoneGap, React Native or whatever).
I hope for Mysa's success, but I'm hesitant to recommend them. This is early adopter territory. You are risking them going belly up and then having an expensive dumb thermostat with no scheduling ability (since their cloud service is required for you to interact with them). In hindsight I would have preferred a z-wave or zigbee device to use with a bridge from a provider I can trust to be around long term (e.g. Amazon or Samsung), the caveat would manual firmware updates. I'm not sure if the Mysa firmware has stabilized yet, so maybe that would be a worse option.
Mysa is quick to criticize using a low voltage smart thermostat with a relay, but they ignore the fact the main low voltage thermostats are mature platforms with better customer support (24hr worldwide). Yep, a relay is going to have a bigger swing in temp, but it's still better than a traditional analog thermostat. If you've been happy with an analog thermostat to date then a relay is a valid solution, doubly so if this is secondary heating.
| Brand | Mysa |
|---|---|
| Model Number | 627843861850 |
| Colour | Beige |
| Product Dimensions | 2.79 x 9.65 x 14.22 cm; 510 Grams |
| Voltage | 240 Volts |
| Material | Plastic |
| Special Features | Energy Insights, Geofencing, Scheduling |
| Item Weight | 510 g |