the rentals are all the same rip off artists... add a percent here, a fee there... then you argue back and forth... but end up paying it anyway. It's the same old game. I use Budget because there is one guy there that (If I'm lucky enough for him to be on duty when I arrive), he'll honor the price as per the reservation ... BUT.. I've also been charged extra from other Budget agents. I've also been in the P.C. airport office where there are I think 5 or 6 desks of various rental companies, when there have been two other customers getting the same run around by other companies. welcome to paradise. LOL just have to laugh and move on.
I'm always a proponent of being safe, and proactive with precautions, but to be honest I think you'll be pretty safe regardless. You'd be just as likely to run into trouble getting from the airport to the budget office at Coco Loco... the chances are low that you'll have any problem either way... just seems that it's more convenient to get the car there at the airport, but do what makes you feel safe.