Admin Center makes it easier to navigate areas of the ACP from the front-end of your site by providing quicker access to some key areas such as User Groups, Appearance, Options, etc.
You can also search templates and users from the menu. User Search uses the same auto complete for user names so you can quickly get the correct user you're searching for. You also have the ability to add custom links under the default links in the menu. The default links adhere to admin view permissions. If an admin doesn't have the permission to view styles, then they cannot see the Appearance icon/link. Same goes for the others. Secondary links (2nd row) do not use any permissions, so anything you add there can be seen by ALL admins, this may change in the future.
To show our gratitude for continued support from our active customers at Pixel Exit we have applied a coupon upon check out so that the Admin Center add-on is free! When checking out you should see the price reduction in the cart.
Suggestions are welcome and are always considered.