well we had a subscription here for toxic and i worked with it a couple of times.
The initial launch of toxic was that you can work with multiple people on one scene. but than they scratched it. there are some really nice features and it is very easy and fast to work with if you get used to it the middle mouse click thingie helps a lot. (feels a bit like crysis hehe).
But the thingis it is a shot based compositing tool like many other node based compositors. so it really couldnt stand its place against Afx at least here were we mostly do trailer or intro movies which are full cg anyway and dont need "real" compositing.
It is a hell of a nice feature to have but i doubt that many are going to use it.
having a scalable toolbar would be much nicher
instead you can autohide it now :S
better than nothing but still lame....