Rated 4 out of 5 stars
Works fine on TB5 if you install the Add-on Compatibility Reporter (Add-on Compatibility Reporter).
I would like to tweak the colors though, they don't match what I am used to in Outlook 2007.
Version 5.0 allows customization of colors
Calendar Tweaks 5.0 allows user customization of 'Today' and 'Selected Day' colors (header background color, day box background color, and border color).