Beard-trimming is the least effective funtion
Other functions are better than the beard trimmer.  The shaver is perfect for ears; the nose-hair trimmer works very well; and just the bare blade works well for back of neck, etc.  Unfortunately, trimming the beard with the attachments (the main thing I bought it for) is very unpleasant, because it grabs and pulls the whiskers like crazy.  And I've tried all three attachments and all three depth settings.  So it looks like I'll be using it just for the secondary functions, then using my large, corded unit for the actual beard shearing.  (I'd return it, but I foolishly discarded the packaging, not expecting to have any trouble.)
Rating: 3 stars