I've rented from Fox for several years now. I remember when their rental place was a tiny trailer looking building, but obviously business has picked up over the years and they built a larger building.
Yes, you need to take 2 shuttles from the airport to get here, but they run pretty frequently. This is the main reason why they are so cheap. There's a very high tax to rent from the main terminal. Keep that in mind when you want to complain about the 2nd shuttle.
The cars they rent here are older and don't always have all the latest options in them, but they let you select any car from the class you purchase so you just have to hunt around with the cars.
The cars will also have some scratches and a few small dings but they are all already marked on the paper that they know about it. I've never had a problem with returning a car and them complaining about the condition. Granted I've never dinged it, but they don't really care.
The service here is fine so I suggest you go with it if you have a bit more time for pick up & drop off but if you're in a hurry both ways I suggest you pay more at one of the larger companies.