So, I picked one up yesterday... So far I have tried it with a 3.5cm Elmar and 35mm Biogon, 50mm Elmar-M (do not collapse) 50mm Sonnar and 90mm Elmarit-M. First impressions are generally favourable. Still learning how best to use the focussing aids - takes a bit of getting used to. Like the fact that installing the module for the first time kicks off the firmware upgrade to the body - no faffing around with downloads and SD cards - neat. Biggest niggle so far is handling; I keep finding myself pressing the OK button or one of the other controls under my right thumb - because my left hand now has to do the work of focussing, I keep finding that I shift my right hand grip and hit the button(s) in doing so - irritating. I'll do some more shooting with this combo in the next week or so and report back.