This apartment is THE perfect location if you want to visit Dubrovnik : very near the Old City (2 minutes' walk), but not in the Old City (overcrowded, a bit noisy...). You can't drive at all in the Old City and the nearby areas, especially because the are steep stairs everywhere.
For this apartment, we parked in the nearby public parking lot (around 10€/day), where we left our car during all our stay.
The owner, Pavo, was very very helpful. He is very cultivated and interesting. He and his family works in tourism, and he advised us on how to visit Dubrovnik and its surroundings (Korcula, Stone...).
The apartment itself is nice, with the best view you would dream of : the sea and the Old City ! There is a private garden only for this apartment (not shared with the owner or anybody else), which is very nice regarding you are so closed from the old city !
I would definitely recommend this apartment.