Just downloaded and installed the (free) 4.1 update . . . Oh, WOW !
Interaction with Sonar ARA is amazing, what a great update, Merry Christmas, editing multiple tracks in the same window at once, multiple audio clips display in one single editor window . . . but dare I ask for more, like colour coding of the orange blobs (eg. maybe some green blobs for a harmony vocal part) so you can actually visually distinguish two different parts . . . yet, somehow I know Celemony will never part from their signature orange blobs.

Gonna have to update. It's encouraging reading all the the good experiences so far...

Their server was a little "jammed" for a bit with requests.  But after finally getting thru, the update couldn't have been smoother and Melodyne integrated with Sonar works like a champ.  I'm glad I updated to Studio, when the offer was available at the very low price.