Wotcha kona, glad to see you're still helping out Note buyers!
I thought it would be as well being class 10 then I've been reading about Samsung cards that are also class 10 which write at 70MB/s. I'm wondering if the class of card doesn't mean as much as it used to, there seems to be Sandisk cards which are class 10 which write at 10MB/s and the pro series that go to 90MB/s.
Good to hear from the numbers that you think it'll be OK though, I have to admit I haven't had time to try it yet!
Even if I do record at 4K at the moment I don't have anything to play it back on, and won't have for some time by the look of it...madness!