No problems once there, but when we arrived on 8/24 they said we had no reservation. But they found us a mooring and we had a good stay.
Then on 8/31, they called us to ask if we were going to keep our mooring reservation for that day. Explained that the reservation had been for the prior week (I have the PDF receipt that confirms the date), and they had no explanation for why this had happened. Do not know whether the problem was at Nantucket Moorings or at Dockwa.