My girls, 1 QA and 2 QA LAN, have all been upgraded to the Windows 10 Anniversary Upgrade. Two upgraded without issue. The upgrade failed on one leaving the OS screwed up. After doing a factory restore on that one, the upgrade went smoothly.
The new upgrade requires a minimum RAM of 2gb. Since that is all the QAs have, I expected the QAs to run slower because it would have to swap to virtual memory. The QAs actually run smoother.