Update from 11:12:14
For a week I shave with the new shaving head. I have the impression that he slightly but noticeably better shave as its predecessor 12/50. The hairs in my problem areas (neck, larynx because "fitting") are recorded faster.
By the way: Clear the part is s..teuer! Sure would consider the old shaving head any longer! If I wanted cheaper's, then I bought a less intensive price shaver.
And as scissors and knives, each blade is blunt so I change sometimes the shaving head.
But who knows - maybe it's just my imagination.
The construction of the new head I feel overall as improvement because:
Daily cleaning with water is possible easily and thoroughly. Although the recommended monthly cleaning appears somewhat more complicated.
And ... On my way to shave, was the lowest "spared" by the three shaving heads compared to the other top because I Mustache and the area around the lips shaved almost exclusively with the top sound. Now rotate the heads through on and taking off the shaver.
Bottom line: Shaving makes again a lot more fun.
So clearly 5 stars