3 nights in Nice is too much. That whole area is overrun with the Russians pretending to have more money than they really do -- not sure if you like that or not. Pretty annoying after a while.

The good stuff is north of Nice, around the Route Napoleon area, Balcon de la Mescla, Aix, Avignon, etc. Provence area. Otherwise, I didn't care for Nice all that much. Whatever. Nice but nothing to write home about.

Nice
TT CAR TRANSIT
61 Route de Grenoble
06 200 NICE
Phone: 04.92.29.13.83
Toll free number from inside the airport : 0 800 803 583
Email: info@ttnice.com
Hours: 8:00AM to 5:00PM, MONDAY - FRIDAY only
(The following is information from the web and googlemaps: Route de Grenoble is the N99 at this point, just off the A8/E80 Autoroute.)
bmrfam provides the following additional detail: "That is the correct location although that address is just the entrance. The parking location and office are about 300m down from there. Once you enter the front off Rue de Grenoble, you need to bear to the right and follow the lane all the way down in front of the long warehouse until you see some trees in front of you. You turn in to the right there and there is a very small building housing the TT Transit office. At least this is what it was 3 years ago and Google Earth appears to confirm. I will be there again in 3 weeks [in mid-June 2010] and can confirm again in person. This is the lat/long for the office itself: 43°40'11.85"N and 7°12'14.58"E."

I dropped my car off this past October in Nice.

The drop off point is not at the airport but nearby. It is probably 2-3 miles away. The gentleman who processed the car will drive you to the airport in their van. We were staying overnight and he took us to our hotel. He would not charge us but he gratefully accepted our decent tip for his excellent service. He was a nice person and very accomodating.

The drop off point is at the rear of an industrial type park.

Make sure you make an appointment. Drop off takes about 20 minutes. We received our car 6 weeks later in Ohio and that included a few day delay due to the hurricane.

We were very very pleasantly surprised by the beauty of Nice. The Promenade is amazing as is Old Town. We had a hotel with a balcony overlooking the Mediterranean and the Promenade. The Nice airport is also an excellent airport.
It _used_ to be like that; now there's a gated lot right next to Terminal 1 and their office is right in the terminal. When you make your appointment, they give you the gate code to get in and park your car.