I flew BUD-FRA recently on LH and with *Gold was able to use the Platinum Celebi Lounge in Terminal 2A (Schengen). It was probably one of the worst lounges I have ever been in. Its a contract lounge, tiny and was packed at my time of use. No real food to speak of, just a few drinks and newspapers. It was not any more comfortable sitting in there than sitting out in the normal departure area.
Not good, but there are worse lounges! Really!