Frankfurt-Cancun return. The main problem is customer service when checking in. When checking in at Cancun airport I stood 2.5 hours in the queue barely getting to my gate in time for the flight. When I finally reached the check-in counter it turned out my suitcase was over the limit for checked-in luggage. I was told I had to pay for this which is fine. What is not fine is that the operation of paying took 15 mins. Extremely ineffective and tedious check-in process. The flight itself is below comfortable entertainment is poor the food is no more than okay and leg room is nothing to write home about. But all of this would be more acceptable if the start of the journey didn't have you running through the airport because ground service is so slow.