These shavers work fine for me using cheap, ordinary shaving cream. Prior to lathering with cream, I wash my face with soap and leave it on the face. While shaving, I clean the blades under running water regularly. (5-7 times) When doing this, I rinse out both the front and back of the blades.
I get about three weeks use out of them, shaving five times a week.
When going without shaving for 2-4 days at a time, I find it problematic to use fresh, sharp blades. In that case, I have an extra handle with blades that are less-than-sharp to take off the bulk, before finishing off with sharp blades on my daily shaver handle.
The flexible head thing was a little odd to use at first. But it only takes changing the angle of the handle and amount of pressure to control the results.
KoS shavers are great, IMO. Every time this woot comes up I buy three.
I'm puzzled why there are all the flames about this product. Whatever...