Back in the summer of 2004 we went on a motorbike trip 'round the Alps; 16 days, 4,000 miles, two-up, 1 top box, 2 panniers and 1 tank bag full of gear including a Valeo 22Wi on a Contax with a couple of lenses, 2X 5GB digital magazines and an iPaq for viewing.
I still have the panoramic stitch from the Mont Blanc somewhere (hand held)...
Anyway it all worked quite well and made the trip back in one piece.
Today there are better solutions for untethered work, with CF cards and on-board LCD screens, but for studio work on either an MF camera or a monorail, the Valeo is still one of the fastest backs and it produces great files.
Yair