I used them when I was younger but got a cheap throw away one and could not really tell. Now I use a Panasonic electric razor and have had it for years. So I got out when the 3 blade was king and "worth every penny" and "shave closer" and "last longer" etc...
I like this part of this news story
New razors have been fodder for parody for more than a quarter century. In 1975, the inaugural episode of "Saturday Night Live" included a mock commercial for a three-blade razor with the slogan, "Because you'll believe anything."
The introduction of Gillette's Fusion razor, kept secret until its debut in 2005, was eerily predicted the year before by the satirical Onion newspaper, which ran a fake memo from a shaving executive bragging about besting a competitor's four-blade razor by making one with five.
http://finance.yahoo.com/family-hom...-fancy-shavers-leaves-some-men-feeling-nicked
When SNL and Onion predict the joke that comes from the razor business and people still buy it up you know its a joke and you are the punch line for buying them.