I took 4 flights with volotea recently in Athens, Santorini, Venice, Dubrovnik. The experience was fine contrary to the reviews I read. We had the print outs of our boardinf passes however we observed that one can us the volotea app as well. The only requirement is that you need to check in before (Check in opens about 48 hours before uptill 2.5 hrs) otherwise they charge you 30 euro per boarding pass. They are very strict with the luggage rules. We followed all the rules & also did not observe anyone checking the size or weight of the luggage. 2 of the flights were delayed by about 30-40 minutes but that was the case with other operators as well. Take off & landing was rough.