I think they say it best;
"Coma are new rave & oldschool techno, 80s pop and 2k-modernity in a deep hug. Giving new influences, voices & feelings to electronic dance music from Germany."
They have just released a 3 track EP, "Famous". It's deep and dreamy but its also got some heavy basslines and percussion. Just what you'd expect when you read the above, taken from their Soundcloud page. Check out "Playground Altona", and make sure to buy the album available on Beatport to fully understand what they're all about.