I have compared the Braun shaver and actually decided on the 7 Series, but as it the time of purchase on the 9-series was a whopping 50 Euro cashback von Braun, I therefore bought virtually no extra cost to 9s. For thus about 210 euros, the razor is ok. What I find unfortunate is the fact that the shaver is can only be operated on battery. Once the power cord is connected, the shaver can not be turned on. Since I have very sensitive skin, a skin sparing was razor in my selection, the A and O. After several Rasuervorgängen with the Braun Series 9 I have significantly less skin problems than it previously with my old Braun Series. 5 The cleaning station I find very good. Although the cartridges for this are not cheap (approx. 4.50 Euro per piece), but in my opinion the shaver in the station is cleaned very well.
In short, the suggested retail price of 400 euros the razor would not have been my value because I got the razors bought for 210 euros, I am satisfied and I will keep it.