The HP iPAQ 310 tries to be fifteen different things in one, including a GPS receiver, PDA, MP3 player, video player, handheld gaming device, and more. Sadly, it's a jack-of-all-trades device that is not very good at any of these things. We'd cut it some slack if just the GPS worked as expected, but sadly even that functionality is plagued with issues. The overall main issue with this product is that regardless of what feature you are trying to use, it is not user friendly, and in most cases reading the manual won't help since it's remarkably incomplete and lacking information on a wide array of topics.
