Bottom line....the ProGlide razors are not a scam. So smooth and as I said before, clean and dry it every time and the cartridges last forever. Even shaving your head. I've tried the Mach 3's and stuff and they aren't nearly as good IMO.
X2!
Buy the cartridges from Ebay or just buy them from Wal-Mart and use them on face, head and body.
If you have hair on your back, just just Veet which is bout $9 a bottles and last a lil' over a month.
If you have sensitive skin, use sensitive lotions/creams to shave and that will help with the razor burn.
Also check out the Gillette Bikini razors.