"A classic camera that is very capable"4.0 starson by Norm_Rogers
Pros: The M9 has very high resolution with 18 megapixels. The menu's are minimalist and easy compared to typical Japanese cameras. Low light performance is good but not as good as as the best full frame digital cameras. Compact compared to SLR's.
Cons: The body costs $7,000 and then each lens may cost $2000, much more. The lenses are hard to get but 30 year old used lenses work very well. This camera is not economical.
Summary: I have a Nikon D700 and some of the lenses for that camera weigh more than my entire Leica M9 kit. Yet the M9 often generates better quality photos. The M9 does not do auto focus. It must be focused manually with the split image rangefinder. This can be difficult to do fast, especially in low light. Maximum ISO for the M9 is 2500 compared to 6400 on the Nikon D700. I have 4 lenses. 21 mm F2.8, 35mm F1.4, 50mm F1.4, 90mm F2.0. The 21 mm is a Zeiss and is too wide for the M9 rangefinder so a separate rangefinder mounted on the hot shoe must be used to frame the picture. The other lenses are Leica brand. The 35 mm and 50 mm are older lenses purchased used (but not cheap) and they work very well. The M9 does not support image stabilization so depending on the lens and shutter speed it can be difficult to avoid blur from camera shake. The Leica flash attachment works well but is quite large. There is no built in flash. In spite of the drawbacks I love the Leica and use it in preference to my SLR.