Mostly traffic free and flat. A wonderful ride.
Note that a few section are "cycling dismount" between early May and the end of September. We went there mid September and the whole place had not a single soul but I guess that in the middle of the summer it could be different.
The route follows most of the time the coast line at close proximity. There are many towns, attractions and beaches to visit. Safe cycling with children since most of the distance travelled is not on public roads.