We did it on Friday this year, which turned out to be the best day weather wise. Saturday was miserable, Sunday was dry but the trails were sodden.
All in all I really enjoyed it. Very tiring though as we’d not been to the Alps before. Really well organized, lots of control points/feed stations. The lift staff were great as we’re fellow riders.
If you ride it on the first day you can do it again as you get a free lift pass for the day after.
Hopefully doing it again next year.