My experience with Florida Premium Rentacar was awful!. In my 30 years of traveling I have never had such a bad experience.
The web site showed a "shuttle" from Miami Airport - that was false! We had to Uber to them. Once we arrived they needed proof of insurance (not stated in email receipt of payment). I cancelled the car and was forced to find a ride to my hotel.
When I arrived at the airport and called them, they informed me that y they didn't have a car for me. They didn't honor the rental contract. Since all other rental agencies in the airport were out of cars I had to hire a taxi to Orlando. They spoiled the beginning of my vacation and caused substantial extra expenses. I have filed complaints against them with multiple relevant agencies.