It's a fantastic upgrade, well worth it if you currently own v3 or 4.
There is *much* more editing power, and it seems to me the IR defaults
(Altiverb-speak for "presets") even sound better right out of the box.
Being able to so much more extensively edit the settings is a *huge*
inmprovement. The only downside is, as it always was for Pro Tools TDM
users, that it's HTDM only. Three instances of it will use almost all
my dual 1GHz G4's processing power, making it pretty dicey to add an
Auto-Tune or two for example, which I only have in RTAS. There are some
other good convolution reverbs that can run under TDM, which would be a
very welcome thing.
Ted Spencer, NYC
www.tedspencerrecording.com