Silbermond

Fucking awesome concert.

They started on time, great music (I could barley tell the difference between live signing and the recorded vocals from their CDs sometimes), good atmosphere and exchanges between audience and band.
They're really nice and down to earth and biggest plus of all: they honestly enjoy playing in front of a crowd, no matter if it's a few hundret people or a few thousand.
They got the crowd sweating in no time and even picket a few people to dance with them on stage for one song. There was even a (planned) stage dive.
When it got too hot and a few people collapsed, they stopped and gave out water bottles that were meant for them.

All in one it's one of the best concerts you can attend (if you enjoy their music and sense of humor).