I finally got a Sony A7II and a Techart Pro AF adapter. I tried it with various M mount lenses and got very good results. There were a few technical quirks which took me a little while to figure out. There is an Android phone app for advanced settings on the adapter which I also tried. Once I learned to use it properly, I was very pleased. This is the result of going on a walk to "Katz's Delicatessen" in NYC for pastrami sandwiches yesterday. I used a Leica f2.8 35mm Summaron, which was a very light and fast focussing combination. It is a liberating experience to use these manual focus M lenses with a modern AF camera. The adapter cost me $259 on Amazon. It is well-made and works as advertised in most situations. I have yet to try it with a large number of lenses but it worked well with 50mm Summicrons, a 50mm Summilux, and a 35mm F1.8 LTM Nikkor (with M adapter attached, of course).