I personally hate it.
Love the new features, but hate alot of the quirks that were introduced (to name one: constantly reformatting my links -- replacing &'s with & especially when a search/replace is done on anything despite the Pref settings), not to mention how damn slow it is over a network.
If they were to address those annoying quirks, I would consider moving back up to it for the code collapsing feature alone
I went back down to MX (I also hate MX 2004).