I find the upgrade policy to be quite reasonable compared to the competition. I started out with Traktor Scratch Duo, and then upgraded to Pro (still keeping my audio 4). Now I'll be getting the hardware upgrade to Scratch Pro 2 with the Audio 10. After all of that I'll still have spent less than if I had gone with the comparable Serato products. The math:

http://www.thewhitedragon.net/blog/1...or-2-worth-it/