I was starting to get a bit of spam on the comments for the PLB, and no-one was using the comments system for actual discussion, so I'm trying out another feedback system: 'reactions'.
To use this, you just tick a box by the response you feel fits best. Initially the choices are 'funny', 'cool', 'interesting' and 'useful'. You can choose more than one. :) Let me know in person or on the Facebook page if you have any other suggestions.