For how many years we were used to get up, ride a taxi or bus for an early morning flight our of BUD.... for any overseas trip you likely take the Lufthansa flight to FRA.
Not a problem anymore! I got up 5 am for the 6:15 flight, still had time to eat the packaged breakfast they prepared for me (the buffer breakfast opens 6 am only). 2 minutes from the terminal and the airport bus. Clean, well run. Staff was friendly. Don't go off airport. This is your best option!
Also has the impression that the staff actually cared about COVID. They wore masks properly and any contacts were minimized.