Compatibility with Z-wave

As far as which hub to get, everything has pluses and minuses. SmartThings is powerful and versatile, but as @helios said it is cloud dependent for almost everything and it has some issues with reliability. Every few weeks they change something in the cloud and inevitably break something else, at least for a few hours and sometimes for weeks.

A lot of times what breaks is minor, but it’s still annoying, and it does mean that at present SmartThings is quite a high maintenance system requiring effort just to keep things running as they were.

The company is very aware of the issue and have said that they are making improving stability their top priority. I believe that, they’re just not quite there yet.

So it all depends on your own needs and preferences. The following thread might be of interest: