LUFTHANSA
The last time I flew Lufthansa to Munich a couple of years ago, it was on a half empty A319.
I've just made a return trip MAN-MUC-MAN on A321s, about 10 empty seats outbound & the return 100% full (inc the front bit), so i should think LH are pretty pleased with MAN.
Also worth mentioning for those that are critical of handling at MAN. I also recently sat on an E195 of Lufthansa City Line at Munich, fully pax loaded on schedule- only to have to wait 30 minutes before a crew could be found to load bags on to it.