Excellent Rated 5 out of 5 stars

Noia is easily the best theme for Thunderbird (and firefox) on offer. It would have my recommendation as default theme for new installations; every new user I install Firefox for immediately appreciates the slick look and feel, once Noia is installed.

It could have a more appealing/easily pronounced name though :)

This review is for a previous version of the add-on (2.34).