Talys said:What you DO get:
5. Autofocus hunts more than native lenses, but its not bad.
6. It's better with wideish adapted lenses, lke 16-35/4 and 24-70/2.8 and 24-70/4LII. Definitely good with 70-200L/2.8 II.
7. Eye AF works!! and pretty well with adapted lens, too.
Which adapter are you using? With my adapter (the metabones 4), some lenses don’t work at all (EF50/1.4, Sigma 70-200/2.8), some provide EyeAF but some do not. Maybe the sigma adapter is better.