Hey Sarah
Looks comprehensive, it's receiving great reviews. The "Backup your database first" tip at the top of the plugin page is essential, take note people!

There's nothing like a bloated database to slow down a website, so it's well worth the time invested to clean it up.

A preventative measure is to limit the number of post revisions stored by WordPress in the database, I use a plugin called Revision Control to limit the number of stored revisions to three.

Cheers
Chris