The Nuvi in this capacity it GREAT! I loaded ours up with over 3000 caches as custom POIs just to see what it would do. It did not choke, sputter or wheeze. It just asked for more. The only caveat is that cache populations are so fluid that the custom POI pages need to be removed and replaced at least weekly as they outdate that fast. 3000 geocaches is 6 PQ. They can be loaded onto the memory card and refreshed in a wink, but the PQs take time to run, download and prepare. So, we normally run with only 300-500 POIs (Geocaches) at a time. The Garmin 60CSx is the best handheld we have used. And; the beast hates his Delorme PN20.
