Review (1/5): Does not work as expected
I watched the instructions prior to purchasing and then was reminded of the installation potential issue. But still took me about 20 minutes to finally get it to stay locked in place. Then to test I turned it on and it appeared to be okay. To be sure I put the old shaver head back on to compare then put the new one back on (took a few minutes again). Since then I have shaved twice and the old haver head (over a year old) does a much better job of shaving than this new one. It emphasizes that you get what you pay for. I should have ordered a replacement that is a true Braun replacement. A waste of my money.