Did not work fine with me:
1) Live view appears on focal window but is slow sync and stops in few seconds.
2) I believe focal is worth it when they develop full automatic support to 5DM3 (which I believe is in development). Doing the manual procedures is, at least to me, is harder than available free manual procedures available on the net.
So my suggestion, don't buy until they confirm full 5DM3 support. The SDK is out, so they should be on it right now.
Make sure to go to devices>usb, and be sure that the camera is recognized.
Worked like a charm
Not that I've heard. In the meantime, I run it on my MBP via a Parallels virtual machine.