GXR with M mount

Looking for some testimonials on the GXR with the M mount unit, specifically ease focusing.

Do you know Gerd Waloszek's Blog?

waloszek.de/overview_gxr_e.php
In the GXR M-Mount Corner you will find a whole chapter about focusing with the M-Mount.

I discovered the GXR far too late and I haven't had the chance to get one so far. Especially with the M-Mount version, it feels to me like a perfect option. While I don't really care about sensor size, in this case I wish it were full frame only so that I could use M-glass with the native focal length. There's a 40mm voigtlaender, for instance, i'd love to use with the GXR.