Jaye - we were apprehensive when we rented a car in France in 2012 (it was only for a few days on the North coast). But my reasoning was thousands upon thousands of people rent every year with no issues, and hubby is probably a better driver than at least 50% of them ;)
We rented with Europcar (via AutoEurope) and lucked out that there was a GPS integrated into the car. But of course the person before us was German and the GPS was speaking German (and we don't have a lot of experience with GPS). By the time we got it speaking English, we had somehow programmed it to go to the last spot it had been - which was somewhere in the middle of Paris. After all my careful planning about easiest pick up spot to get out of the city. Sigh. Luckily, it was a Sun morning, so traffic was light...and somehow we never got a ticket in the mail even tho we both went into a restricted driving area (which is where the last person was - maybe they had it registered) and drove up a bus lane! We were lucky. Hope our luck holds this time around!