I purchased this a month ago but ended up upgrading again to Superior Drummer. I've already spoken to Toontrack and the license can be transferred without any problem at all. It is a great program. You can add a multitude of midi add-on packs for most genres.
The program retails for $170 plus tax at Long & McQuade. I purchased this directly from Toontrack and paid just shy of $230 Canadian.
I have a drum machine and this program is far superior. Much, much quicker to program and customize too.