I've heard some good things about this company and it's captain/crew.
The only downside for most CRT'ers - is that they are located in Playa Ocotal/Playas del Coco, in North/West Guanacaste, up in the Papagayo area. From San Jose, it is about 4+ hours by taxi each way (on a good day), even longer by bus. Or you could take a 40 minute flight from SJO into Liberia Airport via Nature Air or Sansa, and then a taxi ride to/from the airport into Coco or Ocotal. Naturally, this would not be a typical "day trip" from the gulch. You would probably want to plan on going there the day before your trip, and getting a hotel in town for at least one night. And then plan on the long ride back to SJO after fishing the next day, or a 2nd night in a hotel.
Tight lines
MG