Well, it's a frame maker out of France. The frames, geometries, and build qualities are ultra top-notch, so much so that many pro racers have ordered CyFac frames and had them re-badged to the team sponsor's over the course of a decade. Pantani is one of the more known racers who ordered Cyfac frames and had them re-badged for his team's sponsor. From Cadence cycling: "Up to 2001, roughly 30% of the entire European pro peloton was riding a bike built by Francis Quilon and Cyfac's artisans in their small Loire Valley atelier. It's no wonder, then, that Cyfac's record of success speaks to loudly."

Pez Cycling shares some of the Cyfac legend in the review of one of the frames from the range:
http://www.pezcyclingnews.com/?pg=fullstory&id=3205

http://www.cyfac.fr/ is the website for Cyfac.

Also, if you do get a chance, stop by a store that has the Cyfac frames available in stock, even though a majority of their work is custom now. You will then see what it's about...