LastLaugh: Good question - especially with the growing popularity of extenders.
First let's talk about FS. FastSize is the same exact thing as the Jes Extender. A few people like the Jes, but the majority of PEers advise against it due to the "loop" (which is more potentially dangerous than the rest). I have, however, talk to a few guys that prefer the loop - such as the doctor who wrote the introduction to my book.
In any regard, I wouldn't trust ANY reviews on extenders out there. Nearly all of the sites that have reviews get a commission, and the reviews are already pre-made by the manufacturer (i.e. the reviews are fake).
I listed the best ADS/Extenders of the "true" PE community on this page:
Penis Enlargement Devices Directory - Penis Enlargement Gym
(note that more extenders might be added to this as new ones come out; and if I get more people saying they like the loop extenders, I'll add those too).