In reply to Rob Halliday:
I did the Clusaz one this trip just gone, and have done the one at Passy a few times. Both steep and slightly more technical than your common-or-garden Italian VF's, but easy enough if you climb.
Make sure it's dry on the Clusaz one though, as there's a lot of seepage, and the wet limestone gave my son and our inexperienced pal the jitters!thing though. The D+ overhang is strenuous, but only a few moves, so don't bypass it.
Lovely walk off, marmotte central!