I found this razor to be underpowered - I don't consider my beard to be that tough, but this razor struggled to provide the same close shave I enjoyed with my old Remington 4843, I would suggest looking at the the Remington MS2391, it is a much more powerful alternative, that I personally feel provides a better shave.
When new there is no indication as to whether the switch is on or off and mine did not seem to charge initially. Takes forever to give a very mediocre shave.
Never have got 60 minutes shaving time - always stops when showing 38 minutes. Is quiet but appears underpowered. Will be returning to Braun foil shaver.
I've always used Remingtons because I felt they were a more solid, better build than the others. However this latest one, the F7 diamond, is very disappointing. The main problem is that it is underpowered - I need to have the 'turbo' button switched on constantly, so its not a satisfactory experience. There is also an important design flaw - the on/off switch is completely exposed and can be switched on by accident, only slight presure is needed. In previous models the foil guard extended to protect the on/off switch. I've just come from a flight to find that my fully charged shaver is completely discharged. Although in its carrying case, it was obviously turned on during the journey. Thus, you need to carry your charging cable with you always.. not good.