I have tried many disposable razors, and aftera few days the blade dulls and the razor is worthless.  Consequently, I ended up wasting too much money buying disposable razors.  Finally I decided to invest in a refillable razor, and already I can tell a marked difference.  Whereas before I had to use the razor several times over the same area in a concerted effort to try to get all the hair, and would still have to go back and forth with the razor, the Mach 3 is much easier.  I simply use it once on each area and the hair is gone.  This is by far the most powerful razor I have tried, and I...