I grabbed this extension a few days ago and must say I am quite pleased. Installs without a hitch and looks great "out of the box." There are a LOT of configuration settings, but I think that is a good thing, it allows you to tailor your gallery to your needs. In fact, I would like to see more. Easily able to edit css from backend and usercontrol seems pretty straightforward. I have yet to find an error, although it is still a new install. I have not tried any external links, saw some complaints about that. I rate this above RSGallery2, Gallery2 bridge, and most of the other galleries that are currently available for Joomla 1.5.