if you're 8.5 in the NBs, go up another 1/2 size to get best fit as they do come up snug. my 1st pair were the same size as my old runners and are tight in length but fine across the foot - I went up a 1/2 size in my next and they are spot on
for the NDW, it will really depend on the day - Stinson Evos will cope with most off-road conditions but the Mafate offers a slightly better grip as it's a pure trail shoe.
getting hold of a pair is the hard part - they're as rare as rocking horse crap! you can order direct from their French HQ but allowing for the € rate at the mo, and they charge a load for delivery (c €30 I think) then that can work out very expensive.
I'm desperate to get a pair of their tarmac versions for road running but they are like the Higgs boson - thought to exist but very difficult to find!!
Edited: 12/03/2013 at 13:33