I did buy an F-Scan2 in April and I am evaluating it. The device shows spurious peaks and at this point I do not think that its DIRP (diagnostic mode) is reliable although the unit costs $4,000 new. I live in Nevada.
I have posted several reviews on this forum about the F-Scan2 and also at http://health.groups.yahoo.com/group/fscan/ but you have to become a member and that may take up to a week. These are very recent posts from mid-April to now.
The F-Scan2 and also the F-Scan have helped people due to its 'Therapy' mode but I do not think it is due to its unreliable DIRP.
I am in the process to modify the F-Scan2 so these spurious peaks will vanish but chances are that the device won't show any response at all after that. I am healthy and I did not use it to zap myself but I am interested in Rife technology and had similar ideas about such a device when I first learn about Rife about 15 years ago.
Even during a DIRP it may have an effect on one's health since it puts out a 12 Vpp sinusoidal wave. Shortly after I did several DIRP scans I had severe allergies for the first time in my life. It might have been totally coincidental due to the wet winter we had here and everything was blooming, who knows?
I am more impressed with the Gerson Therapy, which is based on a raw vegitarian diet. It can help with many degenerate diseases. I recently bought a DVD (you can also watch it on-line) and was so impressed that I decided to try the vegan diet. It is now two weeks but I don't feel much different. I lost a few pounds, which is normal for the Gerson Diet since you loose a lot of bound water. I also want to get rid of heavy metals that may have accumulated (search for NDF), I just received it in the mail.