If i didn't get free razors through the fitness center at work I'd definitely buy from these guys. I probably will once I leave work in the fall to go back to school.
I can get the same number of Fusion blades from Amazon S&S for within 10% of price, with free Prime shipping, compared to their $9/mo deal. There's no way they're better than Fusion; at best, comparable, but I think slightly inferior.
The $1 razors suck; opportunity cost of using them exceeds the money saved. Plus, shipping, so it's really $3/mo.
The $6/mo is a Schick Quattro equivalent. You can get 4 of those for $1-$1.50 ea; same price or less.