Pros: The first leg, Madrid to Vienna, was great. Check-in and flight crew were friendly. Check-in line was very long though. Took almost an hour due to some passengers adjusting the weight in their bags.
Cons: The second leg, Vienna to Sophia, was not smooth at all. I did not get a boarding pass for it when I checked in at The beginning in Madrid. At Vienna airport, no one knew where I could get the boarding pass. They sent back and forth between terminals and between airlines check in counters. Finally Austrian airlines issued the boarding pass. My bag did not arrive in Sophia. Two other passengers, who had also transferred, did not receive their luggage either.