I've used a demo of it and it doesn't work for all games. For the games that do work, Virtual drive is very good. It displays an icon in your taskbar and you simply right click and select whatever game you have. Copying each game cd to your hard drive takes up alot of disk space.
You can check what games are supported via click here.
One program that I find much much better is Alcohol software (recommended to me in one of my posts). click here.