I got the Samsung SmartCam HD Pro 1080p last year when I bought my house and integrated with Smartthings. Had the same idea as you: it’s Samsung, it says native integration with Smartthings, it must work seamlessly.
I returned it after a week because of the terrible functionality. At the time, you couldn’t use the camera’s motion sensing to trigger SHM, which kind of defeats the purpose of a security camera, so that was a total deal breaker for me. Not to mention, you’re pretty limited in your options with the camera. Basically it will record for 2 minutes if an event is triggered, and that’s the extent of it’s functionality. Live viewing through SHM is nice too.
Blink, however, is fantastic. It’s small, affordable, lightweight, AA battery-powered (which should last 2 years with normal use and you can place it anywhere without worrying about power), integrated extremely well with Smartthings (just not native with SHM), it has motion sensing, their newest camera has night vision, you can adjust the sensitivity of the motion, you can adjust clip length, recorded events are stored in the cloud for free for a period of time, there’s just a host of reasons why it’s a fantastic product. There are 2 cons, lack of native SHM integration, and spotty live viewing in the Smartthings app. Rboy has done a great job with the smartapp, but live viewing is slow and doesn’t always respond, and that’s not really his fault. However, the Blink app couldn’t be better. It’s very quick and user-friendly. I guarantee you I can check on all of my cameras through Blink before anyone else can do it through a SHM native camera. It’s super fast and responsive.