The installation of the replacement part offered here is easy. Just as usual, put on, turn on the shaver for 5 seconds, which it was. I noticed is that, according to this approach, more recently, the illuminated sign for the next shaving head replacement lights down on razor shortly. That was not the case with the original shaving head.
I was actually assumed that optimum performance can be expected, at least for period of 18 months specified by the manufacturer. An exchange after one year seems to me quite early and costly in the long run, because the Braun shaving parts are not exactly cheap. Three replacement shaving heads cost at least roughly equivalent to a new razor.
My old Braun razor I've replaced a year ago and its model designation is unfortunately slipped my mind, in any case had no such high shear head-spare part requirements. Well, what is today still as before ...?