It has reached the stable repos and is quite impressive - as Compiz always has been:

All the good old compiz effects are, there and I have to admit that I liked them during my Gnome 2 days. Now I can use them again in a light version

And I must admit that it has far more options than kwin.
But since moods change i have made a button to switch between Kwin,Xfwm4 (the default) and Compiz.
So when I am in a mood to write on my desktop with burning flames and put it out with water - I switch to Compiz

It works wonders when Windows boys feel sorry for me when I am in Openbox or even in plain CLI with tmux. and show me all the GUI stuff windows can do.
After a switch to Compiz and do some magic stuff - they are completely silent and in awe

If you need it?
..eh no.. not at all - but you can use it - That is the beauty of Linux.
