Vertical integration and progressive company are good for Apple but for the consumer they are irrelevant I think.
Security is ok, privacy must be a joke, siri is listening, just like google. You have to be logged in to install an app from the store etc...
Pretty limited ui. Some might like it, some may don't, but they can't change nothing.
It works between android and any linux distro through kde connect. It let's me do more than just clipboard sharing. e.g.: I could remote control my laser engraver through it.