GDL-TIJ return. Check-in for my departing flight at the GDL airport was smooth. Once on board I found the seats to be very narrow and it was difficult to avoid hitting the man in the next seat with my elbows when reading. I am not particularly large 5'2" and 125 lbs so my size was not the problem. The flight attendants were very late serving the beverages and small snack. Overall the flight was not bad and was full. On my return check-in was lengthy because there was only one person at the counter. Finally they got someone else at the counter who was more efficient and the line moved more quickly. On this flight the FA's served the beverages and snack earlier in the flight. The flight was smooth and we arrived in GDL on time.