The adapter comes in a plastic bag with no frills. It fits 100% into the Thunderbolt adapter.
For me, however, there was a crash of OSX, as I (with already inserted HDMI cable) put the adapter to the Thunderbolt port. This was repeated. It is therefore advisable to first connect the adapter to the Thunderbolt and plug the HDMI cable / VGA in the adapter. In this sequence there were no problems and with CMD + F1 could switch between extended and double screen without any problems.
The resolution of the adapter is ideal, there are no streaks or wobbles.
All in all a class device. Whether the error as described above, I can not say occurs at all Macbooks.
