My site is on a share host and I do not have access to the server directly with ssh. I was having difficulties extracting my extensions that refused to install. After using this extension to extract the files to the temp directory, I was able to install my packages from there.
Deleting the folder afterwards was also very easy.
It fits right on the top of the page without obstructing the menus. I had to do some adjustments (on the css) to make the input boxes fit to the login column though.
I highly recommend this extension for anybody looking for a non-obstructive login extension.