You’ve gotten a lot of good information already, but I am a little bit surprised that someone who has been using Nexia to manage a rental property would be considering moving to SmartThings.
SmartThings is primarily a cloud-based system, and there’s been at least one major outage each month for the last six months except for January.
In addition, there are maintenance updates which you can’t either postpone or delay which will take the system off-line for anywhere from a few minutes to several hours. We usually get an email notification of these a few days in advance, but not always. And it’s not uncommon to require that after one of these updates, several individual devices be manually reset, which requires being at the location to do so.
I like the advanced features of SmartThings, particularly the notifications, but if I were a landlord it wouldn’t be my first choice for remote management.
See discussion in the following thread:
Of course if you live close enough to your property to go by every time there is a problem, and you’re OK with the system being off-line during maintenance, then this may not be an issue for you, but I just thought I would mention it.