I had a very nice experience with Mapache Rent A Car. I rented with them by booking through http://www.centralamerica.com/cr/tran/mapache.htm They’re a travel agency based out of Miami. They’re running some internet special on their site right now. It all was very smooth, pick-up, drop-off, no line at the counter, and when I returned the car after a month during the dry season (car was filthy inside and out w/ lots of mud caked in the wheel well) there were no extra fees.
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