Wirelessly Connected Smoke Detectors: Do They Work Well ?

Anyone have any experience with those wireless type of smoke detectors ?
The type where several are connected, wirelessly, so that if one goes off, they all do.
Do they work (well ?) ?
Any brands or models to stay away from ?
Do cel-phones,Routers, etc. tend to set them off ?
Work as well as the wired (between the units) type ? Which is the more common approach these days ?
Any caveats, etc. ?
Thanks, B.
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