Pros: The people were friendly and (thankfully) spoke English. The "Large SUV" (a Suzuki Grand Vitara) met my needs perfectly although I originally got a smaller vehicle not realizing how small it was going to be. I asked if I could get a manual transmission and they did that for me too, which was great. The SUV performed great on dirt roads along the Guanacaste coastal region.
Cons: I opted out of insurance when I booked it, and that was probably a mistake. I think it was a lot cheaper if I had booked it online, and without this I had to buy there and it was almost twice the price of the car. That SUCKED.
Car rental locations in El Castillo de La Concepción: