If you don’t have time to read the entire 5600 words, skip over to the part about the lens:
Leica lenses are almost always about as good as human beings are able to design and make … These are the first medium format lenses from Leica and the first autofocus lenses from that company. They are the beginning of a new generation of optics, and Leica knows that they have to be exceptional.
If you can’t visually imagine how good the lenses are, there’s one image to illustrate it. Never in my career I have seen an iris so beautifully rendered, one’s shadow so clearly visible in our retina on a single photograph.