I've been using the samsumg smart things hub for 1 year. It's a great home automation tool and during this year I have grown quite fond of it. I now take the things it does for granted and it makes my life just a little bit easier.
What I've done with it.
Both me and my wife have gotten so used to the automatic lights always being on, you never have to worry about it being dark, I cant even remember when I last turned on a light manually in the morning like a caveman. And if you get up at an odd hour, you can just say "hey google, turn on the lights" and the problem is solved.
My biggest grief with it are the "hidden" cost. But the parts are slowly getting cheaper. For it to be any good at all you need a lot of connected parts such as the wall socket switches. I have some where around 12 of these switches throughout the house. As of right now they costs around 25 USD each. They started at around 35-40 USD a year ago. These work great if you want to and can connect an entire light fixture with these.
If you however want to automate a regular ceiling light (that dosen't plug into the wall) then you need to buy lights that work with the z-wave or zigbee protocol (that the smart things hub uses to communicate with the things). Ikea has come to the rescue here.
It was actually when Ikea started to make the automated lights that I got into this and bought the hub as before then I saw this as simply too expensive. But now with them entering into the market you can get a connected light for as little as 10 USD. Which is massively cheaper than the Phillips hue or similar lights cost. The only downside is that you cant set the entire RGB scale of colors.. But I think thats mostly a gimmick you get tired of anyways. The below light costs 9 Eur from Ikea. I have 20 of these around the house both inside and outside. They work GREAT.
If not for these lights and ikea producing them so cheaply my excitement and the result of my home automation would not have been positive at all. The only downside to these lights is that they are not officially supported. But they none the less work perfectly.
So, all in all. One year later. I have bought lots of "things", and that is something you need to understand before getting into this. The hub is the small part. You will need to buy LOTS of additional things before this is usefull or fun at all.
As for the app itself (the only way to control the hub). It is good. I would wish there were a few more options but it covers almost all of my use cases exceot a few odd ones. The light blinker that my wife uses to call my attention that turns of 10 seconds after being turned on took me a while to configure. But all the standard turn something on at a certain time or trigger something based on another event are really easy to configure.
'All in all, I would buy this hub again.. and if you have been thinking about doing so you can now safely jump in to home automation and not worry too much about costs and compatability since prices have dropped significantly and most things just work.
Just rememer once you start, there's no way to stop yourself.
If you want to read more about the hub you can follow this link