Travel several times a year MAN-BCN, & Usually travel KLM or Lufthansa because the flights are cheaper than the direct ZB service & also greater schedule flexibility.
Was going to book MAN-MUC, but Lufty was cheaper anyway, so fortunately not faced with a late expensive re-booking.
I used to be Silver Card holder with ZB but now not found any suitable flights with ZB since May last year. I wish them well with their new expanded network, but can't help feeling the company has changed for the worst, IMHO.