Rated 4 out of 5 stars
Seems to be the only "orbit" theme compatible with FF 5, and I've been using the orbit yellow themes long enough that it just doesn't feel like firefox without one.
Pretty good, no problems so far, but not quite the same as Orbit2008, which had better looking buttons. The icons in this theme lack the appearance of depth and have a slightly aliased look (jagged curves) on my 28" screen. (Whereas Orbit2008 gave the buttons a raised appearance ad looked smooth and nicely anti-aliased on my big monitor.) Otherwise, it's just what I was looking for, and even with those slight graphical issues, it's a welcome improvement over the default look.