Smart things version one, the one currently being sold, is totally dependent on there being available power and available Internet. It does not have a cellular communication option.
Speaking just for myself, my minimum requirements for a security system are that it work when the power is off, it communicate via cellular, and it is professionally monitored. None of these three things are available through smartthings as it exists now. Yes, I could add UPS back up for both the device and the Internet, but if my Internet was out it still wouldn’t work.
So I myself contract with a completely different security company for a monitored system. I use smartthings for convenience case home automation, things like turning out the lights after I went to bed.
Version two of smartthings, which has been announced for sometime this summer, will have some local processing, which makes it less reliant on the Internet. But still not cellular communication and you would still need some kind of UPS power backup. So I won’t be switching my security system to smartthings then either.
but everybody’s priorities are different. Some people can’t stand the thought of paying a monthly fee, even one that’s relatively low, and so options like smartthings look better to them.
“Peace of mind” means different things to different people.