I'm a fan
I've only done short haul with them and long haul can obviously be very different but I would be quite happy with them. Cabin service is fine and I never saw anyone refused an extra drink. But again this is short haul. They may want to restrict excessive drinking on an 11 hour flight!!! And I wouldn't blame them! Never found seat recline an issue but then again it might be different on longer flights. And I've gone through Frankfurt numerous times with no problems. Munich I've never been to but it is highly rated as an airport.
I think you can choose seat purchase but you can check in from 24 hours out and pick your seat then and that usually does me. You should be able to get a window seat at check in. So far so good as far as I am concerned.