I went all in on the Hive system (heating, cameras, etc) and have only negative things to say about the entire company. Even for their heating systems, do not use them. Don't take my word for it. Go and look at the app reviews. The app is buggy, barely functional and their support is incompetent. Frequently, I'll turn the heating on and the app will (after about 10 seconds) show it's worked. I'll turn off my phone and wonder why the house is still cold. Open the app, and yeah, it didn't actually turn on.

The UX is very clunky too. They've tried to make this "app/phone" like dashboard, where you can drag and drop devices into pages. But it's completely broken (on Android, but looking at the reviews, I assume iPhone too). When scrolling/swiping the page just get's stuck half way through.

Every update makes the lag/delays and errors more frequent.