I used to use the Schick Quattro, with its 4 blades. It did a pretty good job, although after a couple of weeks it would start to pull the hair more than I liked. I always laughed about the 5-blade Gillette Fusion, because the concept seemed so utterly ridiculous. It was just like the old SNL sketch about a 5-bladed razor: "...and the 4th and 5th blades? They don't do anything, but aren't you glad they're there?"
Last fall, I received a sample Gillette Fusion in the mail. I figured this was a great opportunity to prove to myself how ridiculous the 5th blade was. Eventually, I did give it a try, and to my surprise it was much better than the Quattro. It did a better job with stubble, it didn't pull the hair, the cartridge ejection mechanism is much easier to use, and the shaft is lighter in weight while still having a nicely high-tech feel.
I switched back and forth over a period of several weeks, and I'm embarrassed to admit that, for me at least, the Gillette Fusion is a much better solution than the Schick Quattro. I've switched completely.