My razor is an older model (but so is my face),
This is the fourteenth (14th) "foil / screen" on this razor, the blades eventually will wear a hole into the screen from the back.
This will take about a year if I use this razor every day.
That's 365 shaves before the "foil / screen" will allow the vibrating blades close to my skin. After almost 20 years with this razor, I still get a close comfortable shave and the long term use and convenience of having dependable razor which works well more than out ways the cost of buying those disposable razors which you might get two or three uses out of before you dispose of them and have to go buy more.
The cost benefit analysis is as follows:
1. No Shaving cream cost.
2. Replacement cost of the "foil / screen" are about one-third the cost of disposable razors (when averaged out over one year excluding Gels, Creams, etc.).
3. The major savings in time and gas involved in going to any store to purchase shaving gel, razors and / or blades.
This one Item purchase includes a new set of blades and a new "foil / screen"
Everything one would need to start over like the razor was, when it was new.