A Westchester Hick - Westchester County
I used Avistar in the past, and really liked the service. I called them to see if they'd match the $12/day rate I found with CheapAirportParking (Avistar was charging $19/day) and they would not.
I took my chances, booked the reservation with Cheap Airport Parking, and was so glad I did. The service was excellent, the location was incredibly convenient (last exit off the Van Wyck, stay to the right on the exit ramp, make a left onto Lefferts Blvd, make another left onto the access road, parking is on the right -- SO EASY!). I was on the shuttle in under five minutes, and at the terminal in 10 minutes. Coming home, the shuttle picked me up in under three minutes, and I was in my car ten minutes later. It couldn't have been easier, and the personnel couldn't have been nicer.