We get a lot of questions on this forum about car rentals, so I thought I'd put this here. If some tech-savvy person wants to move it to the thread that someone started a while back about car rentals, that would be fine too.
Last week we rented from Alamo at LIB for the first time. In the past we've always flown into SJO. We got a small Suzuki subcompact for 6 days, including mandatory insurance but minus extra insurance for around $250. We thought this was a good price. We got in and out of the airport and the rental office quickly and the service was good. I did spend a little extra time there explaining the insurance situation to a couple of American guys who were there for the first time.:)
On our second day, we got clipped on the driver's side by a passing car and our side mirror came loose. We brought the car back to the Tamarindo office of Alamo and they gave us a different car with minimal fuss. On the fourth day, we blew out a back tire, limped to a nearly mechanic who quickly changed the tire for us (and wanted $4 for it-seriously? What a sweetheart. We gave him $20:). Alamo replaced the spare when we got back into town.
Upon returning to LIB, we got the damage report to send to Visa (we had already taken photos of the two incidents), so now we'll see how easy it is to get credit card reimbursement, and probably use that as a guide for whether to pay for the extra insurance next time. We were actually pretty shocked at how cheap the two items were-around $110 for the mirror, and only $50 for the tire. I can guarantee that both of those would have been easily doubled, if not tripled, in the U.S.
So overall, good customer service, good experience. We would recommend them absolutely.:)