I'm working the Braintree integration, I have Magento 2.1-rc3 installed.
Two issues are happening:
1) Error: "Unable to place order. Please try again later." and Magento redirect to Shopping Cart again.
In this case I checked the debug.log and it shows the status of Submitted to Settlement, it is communicating normally with Braintree, I can find the tests there, but all of them shows "Submitted to settlement" and the order don't go through.
I'm using amounts of $139, $85.90 and the test credit card:
5555 5555 5555 4444
It should go through. Or at least, Magento should show the some more friendly error to the user, maybe to try a different credit card.
2) Credit Card fields disabled in Google Chrome.
The payment option shows up, the fields are there, but there is no way to type in, they seems to be disabled.