MechBunny's tube is very user friendly, both in use and modifications / add ons. It basically is a framework on top of which you can build anything. It runs some of the biggest tube sites and does it very well, it scales like a mofo and is pretty much what i consider a very well built script.
Support is nice too, Konrad replies fast and they are also doing custom work. If they too busy, i do
MechBunny coding too and i'll be happy to help
I have been working with it since many years ago and i know it in and out, highly recommended
