Gillette Mach 3 Refillable and Disposable Razors Review

I just want to express my opion on the Gillette Mach 3 replaceable blade razor. I've been using this razor for years ( around 7) and I've now got 3 different ones ( all Mach) They shave real smooth and close. The blade stay sharp for a long time .  It works a lot better then most women shavers I've tried,so I've stuck with the Mach 3 But I really think the replacement blades are way too expensive.