Yes, I'm a fan of Quinetic and have fitted loads of them. As
@littlespark says it's a no brainer if it saves running cables, redecorating etc. The ability to add a switch anywhere is a real bonus, and cost-wise I have not had a problem with clients baulking when the alternative is more expensive and very messy, especially in period properties. As for controlling with apps on phone, I'm just not a fan at all. It's fine for some, but not something I would do...I don't even like dimmers, so many failures and hassles over the years. i replaced all mine with the push-on-off modules that just work...all the time. Add LEDs (I love 'em!) into a dimmer mix and as you know there are so many threads on here about dimmers and LEDs not behaving, so why would you? I can still get off my seat and switch the lights on or off!
Quinetic and the dimming receivers are a bit hit and miss too...
However, I have not had a standard Quinetic setup fail in over 10 years. I installed a couple of switches to 1 receiver last week in a building which is part of my local Men's Shed charity, and the ease of installation against running cables made it a joy of a job.
The main building has several Quinetic switched lighting circuits, in use daily now for 4 years or more, and not one failure. The type of building would have required conduit installation onto brick walls for all the switch drops, but we have none so it's clean and simple, if anything broke, well it's all easy to see, easy to gain access, and very simple and quick to fix. We have 3 access doors from the outside, and a main panel which controls all the lights, but adding a switch at each door was a doddle.
Other than that, I'm not bothered about switching my heating on from the other side of the world...why would I? My neighbour pops in to do that if required, which, so far, has been never!