Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Inaccurate, lousy support, no updates

While I really like my Magellan Platinum GPS receiver, I find that the Mapsend Topo software is worse than having no detail map loaded at all. The maps loaded by the software are pretty consistently wrong by about 200m. In most situations, this will get you DANGEROUSLY lost.The GPS itself is generally very accurate, so if you put in waypoints from a real mapping program, like the National Geographic TOPO! Series, you'll get where you need to be. Using the Magellan software, unless you know how far off it is where you are, can be outright dangerous.My worst experience with this was trying to navigate jungle on Kauai, but I have found it no better, in terms of accuracy (but the fact that you can see the terrain makes it less of a problem) in Southern CA and Northern Baja.The software also has not been updated in over 2 years, and no update info is available on Magellan's site.