Nice piece of software to emulate and record CDs and DVDs. You can run your ISO CDs or DVDs at about 200X. Great for when you have a game or program that requires a disc to run from your computer, simply mount the image file. I copied all my major programs onto my 2nd. HD as ISOs so I don't have to pull out all my disc to reinstall everything. Being some of my programs are multi disc my install times are less that half the usual times it takes going through the regular CD or DVD drive.