As you know we now have three new EF to E-mount adapter that support full electronic control (aperture and autofocus).
One is the [shoplink 15031 ebay]Techart EOS-E-mount adapter (here on eBay)[/shoplink] Than we have the [shoplink 15320 ebay]RJ EOS-E-mount adapter (Click here)[/shoplink].
And soon to come the updated [shoplink 15341 ebay]Metabones Smart Adapter II (only the older version yet available on eBay)[/shoplink].
DC.watch (translation here) is the first website to test the new Metabones adapter and compared it with the Techart adapter. In short the Metabones has the better AF performance according to the reviewer (and is also the adpater the costs most!).