Bought my first MTM shirt from Propercloth.com. Thought I'd share and see what people think. Overall a great experience -- website is intuitive, pretty good selection of fabrics (although they don't seem to have many stripes that appeal to me), and lots of fit customization available including (in additional to the usual suspects) tons of different collar options, optional watch allowance, shoulder slope adjustment, posture adjustment, regular or tailored armpit fit, and forearm customization. Pretty cool. I followed the directions on the site and measured myself. Here are the results:
This shirt has been laundered several times, and there was a bit of shrinkage (which they say they to expect), but I'm pretty confident the shirt is stable now.
Overall I'm pleased. I think I am especially tough to fit since I'm a tennis player which has caused my shoulders to get quite uneven over the years (right one is lower than left one). I assume this is about as good as I can expect without going bespoke.
One concern I have can be seen in the second picture, which is a bit of bunching around the shoulder area. This is present in the other shirts I ordered from Propercloth as well. Also the collar ended up shrinking a bit more than I expected and is now perhaps a tad tight.
Hope this is helpful for anyone considering trying Propercloth out. Of course any feedback as to how I should improve the fit for my next shirt is appreciated.