3 years ago , I took that route with truck and 5th . I had owned the 5th , for 5 years and had never broken a thing till I was on that road.
There were 3 areas under repair at that time, one where the mud in the detour was 4" deep, but many miles that needed work.
Some grades are steep but short climbs. Brush up on your French, no English on the road signs. It's a long slow route, don't try and rush through.
You also need to be very aware of the weather forecasts. There are long sections of the road carved out of the base of the cliffs , at high tide water level, and signage in several areas warns that storm waves may wash you off the road.
Beautiful views ,yes , would I drive it again , no.