The airline with the best average rating is Copa Airlines with 7.0/10.
The average flight time is 1 hours and 24 minutes.More information
The AV lounge in SJO is a decent and adequate one with views of the tarmac. The self serve buffet was limited but you could also order items like panini and sushi, although the quantity was in the small side. This lounge proved to be much better than the Copa one at its PTY hub in terms of layout, aesthetics and catering.
Another short and efficient flight on CM with a choice of snacks. The roast beef sandwich was soft and tasted fine. The small cheesecake was delicious. I don't think that it gets better than this on a 1 hr. flight. This time the flight was during the day so I had the chance to get good aerials and spotting.