Long time M user and I bought this a few weeks back, body and 24-90 mm lens. Happy so far, steep learning curve if you are an M user, the menus and 4 buttons are not as intuitive as you might expect, for example to get to focus peeking, you need to press the BR button N times depending on where you are.... Create user profiles for situations asap, they make the camera much more usable. I have one for portraits, one for landscapes etc...will save navigating the menus unless you have something in particular you need to change. Agree the camera is heavy, but no more so than a higher spec Nikon or Cannon. I changed the strap to something more substantial which made carrying easier. Most of what I do is travel and street photography, so the camera is a bit intrusive compared to the M, but I will use each where appropriate. The zoom is fine, I wish it was constant aperture across the zoom, f4 at 90mm isn't great. The best thing however is the ability to use my M lenses with the adapter. I have a substantial investment in M glass so this was vital. Focusing is EASY with the zoom in the viewfinder and focus peeking. To be honest image quality withe zoom is almost as good as the primes, with the exception of the fab bokeh with the 90mm at f2-f2.8. I'm hoping for a fast AF prime in this length at some time for portraits. Anything else, price, of course, the lens is expensive...start-up is SLOW if the wlan and gps are on, turn them off unless you need them. iPhone app is fun, trigger the camera from the phone when you want to be sneaky in taking a shot..
Will update as I use the camera more, Here's a shot from last weeks trip to Death Valley...