This has by far been the best setup for me because it gives me the benefit of Ubuntu (eg. awesome repo) but with a FUNCTIONAL deskop that is nearly identical to the glory days of 10.04. I've tried Cinamon, XFCE, had a peek at KDE, but it just wasn't the same. I've grown so attached to the 10.04 desktop, having used it at work for nearly 4 years.
Setting up the Ambiance theme like in 10.04 was a bit of a pain in the ass due to GTK themes being broken left right and centre (FIX THAT SHIT NOW!). Here is what I found worked. Install crunchy-orange theme, but select the default Mate Ambiance theme, then customise and manually set Controls/Window Border to crunchy-orange and icons to Humanity.