I've been using them a bit the last few years and I'm very impressed with the service I have to say. I know there's been strikes before but this seems to be a rolling one.
Do strikes have to be announced well in advance in Germany? They seem to happen with very little notice. I have one flight later in the year that I have to take and I will have to make rearrangements if there's a threat. How long in advance are they notified to the public?