I don't disagree with any of these posts. Superlative service AND image quality from my Hasselblad system. Superlative image quality and portability from my M9 setup. Service and support however sucks big time.
My 6 month old 35mm f2 Summicron started to fall apart and I therefore sent it to the address in the UK as per the guarantee document. Just to be on the safe side i emailed Leica to say it was on its way and a day or so later got a message to say that I shouldn't have done that. All repairs are now handled in Germany and Milton Keynes will just return my parcel. Okay, I said, why can't they simply send it on to Solms? No can do and don't know why. Okay I said when it comes back I will send it to Leica's office in London. Guess what? No can do. On receipt of a faxed or emailed form Leica UK said that they would arrange collection (this is where I wait in all day and the driver does not turn up!) but I absolutely cannot send it to their London office - too risky!!!
Further discussion elicited the response that I could bring the lens in and they would then send it to Solms. So I gave up a day, got a train to London, and delivered the lens. I was told to expect to wait 4-6 weeks for its return. At that point, to be fair, they did say that they would lend me a lens whilst mine was being repaired.
5 weeks later I got an email to say my lens was back. Great please send it. Sorry - you guessed it - no can do. You have to get in the train and travel back to London and pick it up.
It seems very clear to me that if you are relying on your camera equipment to earn a living do not under any circumstance rely on Leica!!!
Hasselblad, Nikon, Canon and Phamiya all understand that the camera and its lenses are simply a tool that needs to work and if it doesn't can be replaced quickly and easily. Leica don't get that point IMO and are therefore TOTALLY unsuited to professional use.