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