I had CDA and liked it very much. But when I moved to Win7 64bit, I could not get it to install and authorize, even though I tried every possibility multiple times for days, including researching similar problems on the internet. It's probably just something quirky about my system, I'm sure other people run CDA successfully on Win 7 64bit. I finally gave up and purchased Pyro Audio Creator 1.5, which is the current incarnation of Pyro. It installed and runs without issues. It's a 32bit application, as is CDA. While in some ways Pyro is not as convenient and focused on Redbook CDs as CDA is, it does the job, and has a lot of other functionality as well, such as file conversion, including mp3. I'm happy with it. It seems to always be on sale for $20 in the Cakewalk store, so it is a pretty good value IMHO.