The app was amazing and saved me more than once, Consulted it often when signs not clear or just for reassurance. The hotels and the transfers were just what was needed. There were no glitches. Rooms and food as advertised. The What’sapp helped my partner when her flight home got cancelled.
Then the hike itself was just amazing!!!
Don’t hesitate to use Run the Alps if you are going to circumvent Mount Blanc. They did a fabulous job from when we signed up until when we left.