Been over it in every direction.  Absolutely no problems in my A class motorhome.  The only 2 problems I have ever encountered are
 - using my old Smart car several years ago as support for my son and his mates who cycled over Ventoux.  They made it but the Smartie didn’t, blown turbo!!
 - last year when we went tried to drive over in early June the top was closed beyond Chalet Reynard because of snow.
Take care with cyclists, especially coming down when I have been a overtaken by a couple of cyclists who must have been doing well over 50 freewheeling!