Very, very nice. I used TST sometimes, but this presents the configuration in a much nicer way and all around looks better. I also love that bookmarks are built into the same panel here. This feels much more like an actual FF addon. Add in auto-hide sidebar CSS and this is perfecto.

Reading the neurotic 1 star reviews is truly a guilty pleasure. Schadenfreude of the highest degree. You people need to log off the computer for a few months and take a walk outside ;)