Thought I would enter my experience here - I took the plunge and voluntarily migrated to Google Home from Nest… as sort of a one-way experiment. I am a heavy IoT experimenter, so I thought my travels through the looking glass might answer questions for folks that I never saw answered anywhere else.
First off, not to be a Google apologist, but - I do understand their motivation here, and it does not seem to be entirely based on an ecosystem lock-in as some folks are saying. It does, in fact, seem to be a decision based off of legit security concerns to having an open API. I do feel that the upcoming Works with Google Home (or whatever they are calling it) API will be a locked down version of what we have seen with WWN APIs.
My setup is this:
- about 150 devices hanging off of SmartThings (these include lutron switches, Keen vents, AxisGear shades, and a few non-LIFX colored bulbs
- about 25 devices on LIFX
- about 10 devices on Harmony
- 7 Sonos Devices
- Ecobee 4 with room sensors
- 6 Nest Cams
- A Ring Doorbell and Chimes
- An Ambient Weather compatible weather staton
I do a few dozen actions through SmartThings, IFTTT and Yonomi - and try to have ST be the hub for most things. I do a lot of personal coding in the ST dev interface, and have started using WebCore more and more for complex actions. (I really dig WebCore). For Nest sensor monitoring in ST I have been using the NST Manager app.
So, some of my concerns before I started revolved around the question: “can I still use the GA voice assistant to communicate remote commands and simple routines to my ST, LIFX and Harmony devices after I merge accounts?” Strangely, I could never, ever find the answer to that simple question in this or any other online community. (Spoliler alert: Yes you can.)
As I started to look at my home, I began to realize that a lot of actions I had been relying on IFTTT and Yonomi for were now available elsewhere. Sonos and GA just started playing together well, so I could eliminate my recipes in IFTTT and Yonomi that did all of those actions…things like that.
The big realization was: (a) I don’t have a Nest thermostat any more after moving to Ecobee last year and (b) I never use the Nest cams as trigger sensors. (I used to, but I found the results to have too many false positives - so I bought standard motion sensors.) and finally, © my back yard weather station provides me with better info than Nest Weather.
So - after some cleanup (I now let GA talk directly to harmony to control my media center, fireplace, etc instead of going through IFTTT.) I was ready to do this thing…
…I did the thing.
End result: absolutely no loss of any functionality in my house at all. The things that need to communicate through GA do, the rest go to ST, IFTTT and Yonomi.
So - if you are in a similar situation and you really do not use any Nest products for sensor input into the rest of your home… just go ahead and merge. Everything will be fine.