Anyone have any experience of using Hasselblad lenses on an A7 - of whatever complexion?

I have read somewhere that in general they do not perform well on smaller format digital. But I have the 120 Macro, the standard 80mm and a 150 lying around without any 35mm format equivalents. Are they worth trying and if so what adapters can anyone recommend? Here in the UK the options appear to be the Fotodiox or Kipon which are easily and cheaply available.

Any thoughts?