Tried out the Z9i with the N810 today and the sound quality on my side was exceptionally good. Was very easy to pair it as well.

Things to look into:
a) I'm often getting a 'not in range'-beep, and
b) I don't get the voice prompt when switching noise-cancellation modes (that's more on the headset's side than the tablet though...).

So far I'm loving it.