Well, at first I was hesitant because I couldn't select the contents of the boxes except to rate snacks, but I actually like the surprise that comes with getting each box. I know I fall into ruts with food, so this helps keep me from getting bored with the same thing.
One thing I would like it to be able to add a "Meh" button. There are some things I'll eat (I don't want to trash them) but I'd rather they be below the "like" option so I'll get them, but only rarely.