In general, for me this is the most optimal razor, but the situation with counterfeit cassettes, which come across unacceptably often, makes it problematic to use this razor.
Has some pros:
I have been using for many years. Good machine, compact cassettes, which makes it convenient to shave in all places.
With its cons:
The big problem with interchangeable cassettes is a lot of counterfeit! Moreover, you can buy a pallet in absolutely any store (or almost in any), as practice has shown.See full review