I tried it out about a week ago and I liked it at first, but... I started to get annoyed with the multiple windows and how they interacted with each other. Example, if you move the code explorer too much it takes up the entire screen and overlaps everything else so you can't get to them. That was really iritating. All the mdi windows should have been contained within the main window...if that's not confusing enough. Like microsoft visual studio, and lots of other programs.
Later,
Paul
http://www.fullmoonshining.com for Pearl Jam Fans