I have been following the launch of this potentially very interesting product https://www.facebook.com/techartadapter/ and even had some (albeit frustrating) contacts to support them in market introduction in Germany.
The concept is almost as ingenious as the AF functionality in the CONTAX AX - I just love it...
As I am planning a trip to New York, I checked, if it is available at http://www.adorama.com/ or at http://www.bhphotovideo.com/ as originally announced - both no longer offer the product.
This and the fact that I have no clue, where I could test the product in Germany any other way than just ordering it direct from China without any assurance what happens if I don't like the performance of the adapter doesn't give me a good feeling.
Any feedback from users who have already obtained the adapter? Ideally I would look for feedback from someone who has used it with CY Zeiss lenses