If you've been accustomed to a Leica (or perhaps another rangefinder camera), it will handle just as you expected. It's a bit bigger/heavier than a film-M - someone described to to me as a M with 'love-handles.' But the wonderful sense of balance in your hand and eye is just the same as with film-Ms. The framelines seem, however, less accurate (which makes me thankful for 'instant replay' on the LCD).
The prints, assuming you have a 17" printer & go up to about A4/15x22.5", are a little bit smoother and creamier than 5D prints, and - because of the crop factor - sharper in the corners. People say that 20x30" prints look good too, but I haven't examined any. The downside is that newer Leica lenses, which are coded to work with the UV-IR filter system, are rather disturbingly contrasty if you're used to older Leitz lenses or big ol' DSLR zooms. You'll sometimes have to do a bit of contrast reduction in Photoshop (or use older lenses). See reviews below, for problems of lense choices & coding.
With a 1.33 crop factor, a 35mm lens is equivalent to a film-camera 50 (actually a 35mm becomes a 47). For the 'classic' film-Leica 35mm point-of-view, you have 2 choices: 24mm (=33mm) or 28mm (=37mm). If you wear glasses, the latter is more practical because it's hard to see the 24mm framelines. Longer lenses than 50mm (=65mm), because of the crop factor & the small viewing area, are not entirely practical.
The M8 is a wonderful but 'cranky' camera, & IMO nobody should buy one without first subscribing to & reading
www.reidreviews.com. You'll find thorough discussions there about all the questions involving IR/UV filters, coding, & lens choices. You can also follow discussions by current users on
http://www.l-camera-forum.com/leica-forum/leica-m8-forum/ - including some problems about quality control & slow customer service on lens coding. But overall, you'll encounter enthusiasm.