I hiked Morro Dois Irmãos in Rio de Janeiro today with the X-Pro 1 and the 35/1.4. My hiking partner carried an M8. The XP1 handled the heat and humidity like a champ (even my sweaty hands). It was far lighter than any SLR rig I've used. It's shutter was quieter than the Leica. A very nice thing the XP1 could do which will be nice for M240 shooters (and a usability advantage over the M8 today) is live view. I hate heights (even though I'm a pilot...go figure) and near the sheer granite cliffs, I could use the rear EVF to hold the camera over my head when looking down to frame accurately (I can see the wisdom of image stabilization now...my knees were shaking...maybe XP2?). I also borrowed my friend's 21mm Elmarit (I use a Kipon LM-FX M-mount adapter), and while on the summit I shot at F16 hyperfocally and activated the finder EVF for perfect framing. It was a very flexible rig and I'm happy to report the XP1 operated like a professional camera should. Bonus: since it's M-sized, it disappeared a bit in my hands and didn't draw attention while shooting in the Vidigal favela afterward (it's on a Gordy's wrist strap if not in the bag). I wouldn't have cruised around with a dSLR around my neck there. I hope someone finds this user feedback useful. I'll post some pictures when I return home this weekend.