I have had a beard for over 10 years. When my old trimmer broke I opted for this, it does the trimming job fairly well, but no better or worse than the trimmers half the price - but that is about it.
It does not trim to zero, so no good at edging- putting in lines.
The guards are a nightmare to put on/take off; and you are never quite sure if they are in the correct position.
But the worse feature is the battery, it can be showing that there is plenty of charge, only for it to completely run out of juice half way through a trim.
I trim my beard every 3/4 weeks and I have never had a good experience trimming with this and never have I thought I achieved the trim I wanted.
I guess spending money on marketing rather than the product has worked for now.