Yup, I have the system. Not sure that Virtual Boackgrounds have been around for 20 years, but the system today is NOTHING compared to what it was 5 years ago. Just think along the same lines as computers 5 or so year ago - no comparision.
It is just like any other tool, learn how to use it correctly and it is a great adition to your studio. In rebutal to the opinion above, I can get you several pros that use them and love them.
One thing to note however, and that is what Brad points out...it is craigslist and you MUST purchase one of
VB's screens to work with this machine. There is several levels of this machine too, some of the lesser machines are hard to get images right with and not worth the money. Again, you get what you pay for.
I wouldn't consider purchasing a machine second hand, unless I knew the seller and knew I was getting a complete machine, working and had the opportunity to verify that for myself.
CJ