***UPDATE*** On October 7th,2015 TechArt released v2.1.0 of the firmware described in this post that remedies many if not all of the problems with the initial release. Read on for my original review. I have made edits throughout the text to reflect the new version.
On August 29th, TechArt, maker of the Golden Eagle Contax G to Sony E adapter quietly updated their firmware to support the Sony a7R II. Originally the adapter did not work with the new camera so I contacted the folks over at TechArt hoping against hope that they would soon have a solution. An individual named Lau wrote me back, assuring that an update would be released before the end of August. True to their word, on 8/29 the new firmware v2.0.0, popped up in the TechArt Update app for iOS (download here for iOS and Android). But they didn’t just fix what was broken, they also added support for the 399 fast phase detect sensors on the a7R II!