Review (1/5): caveat emptor
This machine is all right if you like to shave three times a day. Otherwise, stick with your blade.
The famous pivoting heads do not actually pivot much, so upper neck, jaw and chin are a real challenge to trim. And two hours later, you feel like you need a shave.
Also, the elaborate cleaning/oiling recommended by the User's Manual will have you longing for the simplicity of your razor.
Further, the cost of replacing heads is a hidden cost. Also, the need to purchase the oil and cleaning supplies. They do not come with the machine.
Finally, the User's Manual (even though labeled 9160 XL) does not square with the machine supplied.
Bottom line: If you're thinking of switching from razors to electric shavers, think again.