I just received my linen shirt. Cloth is really nice, fit is perfect, no issues with the armholes. Button stitching was a mess, however. Easily fixed, but I'm going to email their service folks. They've made a good upgrade to their MOP buttons, both the normal and thick -- much more translucent, less milky than previous.
Unfortunately, they are out of the linen I used -- for future reference, the fabric # was l21.
Will post pictures in a bit.