I bought an MP as a demo not long after they were first offered, and used it for a year and a half. During that time I had to take apart the eyepiece several times to clean out crud that accumulated inside it and finally seal it with automotive caulk. It is a non-threaded design with a large gap on one side and a rubber overlay that was supposed to seal it but didn't. Leica has since begun sealing it at the factory, but the design still requires sealant that the original M6 doesn't. I also had to shell out $180 for an add-on rewind crank because of difficulty rewinding it quickly at several weddings I was informally asked to shoot. Eventually I sold the MP (got back what I paid thanks to the new price having skyrocketed in the meantime) and used the money to buy two M6 classics from KEH in "bargain" grade (both at least ebay "Mint minus" 😀 ) plus a Voitlander 28/1.9 plus a brick of film. Whatever purported "improvements" there are in the MP metering and shutter, have not impacted me significantly enough to warrant mention. I rarely have a problem with the viewfinder "flare" but if I did, $165 to DAG would solve the problem a lot cheaper than buying an MP. Don't get me wrong, the MP is a beautiful camera, but functionally (all that matters to me) there was not, to my viewpoint, enough difference to justify the huge price spread.
