When I booked the rental car, I wasn't aware that this rental agency is not located with all the other rental agencies at the rental center at McCarran airport. And like everyone else mentioned, you need to take one shuttle from the airport to the regular rental center and then from there, you take another shuttle to get to Fox (they said it's because they are fairly new there and the rental center didn't have anymore room). Fox is about 2 miles away from the rental center at the airport. I really should have checked out the reviews on this place first before I booked the rental.
I didn't personally rent the car myself (I waited outside the portable office), but my husband said that they were friendly. We got a car with 50,000 miles on there but we had no issues with the car whatsoever.
When it was time to return the car, my husband dropped me off at the airport first and it took him about 45 minutes to get back to the airport (after returning the rental car and taking 2 shuttles).