How does the latest win 10 mobile build run on older phones such as the 520/620?

Just wondering what peoples experiences are running the latest win 10 mobile build on phones like the 520 or 620.

Members may post in all forums. Please use Ask a Question only for issues that need an immediate answer to keep your device functional.

There is a lot of great info from actual users of the Tech Preview in the Win 10 Mo Forum and the specific device Forums.

Please continue your conversation in an ongoing thread.