Trying to watch last nights game, I wouldn't say it's a good start.
I am casting from an Android device -
If I come away from the app, or the phone turns the screen off, when I go back to the app it resets and disconnects the cast
Every time I restart, it defaults to highlights, not full game or giving me an option before it starts
When casting, I can't skip forward
On the plus side, I've installed the Samsung TV app and it carries on from where I was on my phone, so that's handy. I can now skip forward and actually it works well and is quite quick as opposed to the old app that you skip on 10 seconds, like 12 times and they you're waiting 4 or 5 seconds for it to work it all out.