My experience with Hertz Ultimate Choice at FLL:
Upon first arrival, there are some nice Mercedes in the Prestige bays but there is no sign or markings to indicate what they cost per day. I didn't recall so I didn't want to risk an awkward moment if they wanted $50 or what. Later I saw that by the Gold member's section that it was $35/day for Gold and $25/day for President's (which I am). I would have done the $25/day but they didn't have the prices marked by the President's section so I didn't know.
There were maybe 5 cars in the Ultimate Choice section for President's. Two Cruze's, two Elantra's and a Verrano. I took the Verrano and it had 27K mileage on it and was well worn. I get on the highway and discover that there's a huge chunk of weather stripping loose and it is making a very loud flapping noise. The alignment is way off so I have to have my right hand at like 4 o'clock to keep the wheels straight. I don't know how they (or even I) missed the weather stripping, it was a 3' section just hanging there.
I turn around and drive 15 minutes back to the airport and returns section. They say I can't just go back to Ultimate Choice and get a car, I have to go in and swap. Fine. After a wait of 15 minutes, they find a car for me, all they have is a high mileage Elantra. I want to get going on my vacation so I accept it and leave an hour later than I should have with a worse car than I picked and not even an apology.
This is another year of President's Circle. I literally don't think I've received a single "upgrade". I've been traveling for work for 15 years. The Hertz cars are getting older and older. My co-workers who use the National Emerald Aisle seem happier and get newer cars. I may try that but the truth is that this is a prime example of why I will do all I can to get projects and hotels where I can use Lyft/Uber or public transit and skip getting a beat up car from Hertz.