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Pro Cleaning is simple
You'll not have to spend a lot of time cleaning the shaver's cutters because the S9721/84 comes with an automatic cleaning station.
Pro Good for sensitive skin
This electric shaver is ideal for those with sensitive skin because its rotary design prevents the cutters from getting too close to the skin. In general, the rotary shavers are known to be good foil shaver alternatives for people with sensitive skin.
Con Expensive consumables
Replacing the shaver's head will cost you a pretty penny since. On average those heads cost around 50 dollars.