The noise level is pretty decent - may screech other. Shaving a "3-day beard" is somewhat cautious introduce hip, otherwise it twinge. The trimmer's enough for essentials. Beard, Nackenhaar- or chop trim should be left more other specialists.
The knife I have to, oh now, I do not know how many years (> 5 years?) Replace what is actually much too late. Since the shearing blades as an accessory, as so often (cf. inkjet printer -. Ink tank) costs in relation to the device too much, the price comparison is worthwhile in any case. However, they are usually 80-90% of the new device (model HQ 6940/16) cost!
Needs improvement: cable slips, though rarely, from the female receptacle of the appliance. This need not be, if you would, for example, a small nose, which engages when plugging the cable construct. But this is a weak point, the power cord is valid for all devices of this type. Beginning on Kofferradio decades ago so - progress ??