BGF_Yankee
Line Up and Wait
I should have been more nuanced in my comments; they apply only at reasonably large airports where, when you reserve with Enterprise through their GA portal, the only difference between eh rental experience is how much you pay. Example I most-frequently noted was Pensacola, FL (back when they had only one FBO).
If the FBO arranges for rental cars, I always use them, and I don't begrudge them getting a cut, either.
Funny, I'm heading to PNS today and had just rented a car through Enterprise when I responded to this! Love flying there and staying a few days...got married on the beach there several years ago now. You can rent a car for the FBO directly through the website there now though. Seems like last time I went, you had to call the office at the FBO. The trick USED to be renting the vehicle for the main terminal and having the FBO staff drive you over there. Oddly enough, it was their suggestion to do that last time I was there and they were happy to do it! They told me they could've believe how much vehicles at the FBO cost vs. the opposite side of the airfield. I priced both this time around and it was actually cheaper to rent the vehicle at the FBO rather than the main terminal...it was only by like $5 a day, but still!
I'm speaking more of smaller airports that are a little out of the way where Enterprise definitely has to deliver to. Sometimes it's worth a few extra dollars if I know someone is following up to ensure the vehicle is delivered.