Unless there's been a foundational shakeup, I'd be wary of Tizen. There have been numerous reports of horribly shoddy development practices and massive bugs.
Never used a Samsung myself so I'm just remembering stories.
I'm not at all surprised. The whole meego, tizen whatever development process was a complete mess. But then again android was too. I still think it's unfortunate.
Not very well. Months ago I came across a couple of references to egregious security problems and outright horrid development practices, of which I've forgotten 95% of the content and only have the left over sense of "nope, don't ever want to rely on that ever".
Never used a Samsung myself so I'm just remembering stories.