I can't get the adapter to couple with a Kiev mount Jupiter 12. No luck either with a Contax RF mount Zeiss Sonnar 135/4. But so far I've had success focusing a Helios 103, Jupiter 8M and Zeiss Opton with the adapter mounted on a Bessa R and Canon P. Check out sample pics in this album. I've yet to develop pics taken with the adapter mounted on my Leica M6 and Canon 7s.How well does that Contax ->LTM adapter work out? That opens up some interesting possibilities.
I also wish it had a distance scale...but then a Kipon or Amedeo is about $300 vs. ~ $60/shipped for this contraption.