I've been using it for a few months - and it's superfantastic. I love how how easily and how much customizable it is. It doesn't affect my page layout at all and seems very logical. I wish I'd find a group that still actively develops it or talks about it more than their homepage tho. There are a few issues that might start bugging me in the future, and they really seem a-snippet-of-code-away from the existing script, but not being developed. Anyway, I'll rather stick to it than change.