While having the ability to manually mess around with any aspect of the blog is a cool feature, one downside to having the manual version of WordPress is that upgrading becomes a bit of a chore. Usually by the time I get around to upgrading, there is a new version of WordPress available by the time I am done.
So I deal with the frustrating nag in the admin page, urging me to upgrade.
The plugin goes through all the tedious steps required to upgrade to the latest version of WordPress. While there are a lot of task screens that must be clicked through, the whole process still goes by substantially faster than before. If you have the manual version of WordPress, I highly recommended WordPress automatic upgrade.
No more tedium, and no more nags.