My cousin bought Clearview because FMS wouldn't work on his Vista OS. It appear to be a small step up from FMS. I notice that you could hit trees you weren't even close to. But the physics ssemed good for the price. The only thing I can see that is a pain is the difficulty switching it to another PC. He has since sold his and doesn't know how to get it on his new one. I think he has to email the company and ask for instructions on how to do it. I suggest you buy something on a disk that you don't have to deal with such problems. But again I personally do not own it even though I donated half of the money for it. -BW