You can search by categories of waypoints, as well as waypoints added from your own collection transferred from an SD card. There are a few tutorials on the web how to do it. .gpx files are supposed to work, I'm just waiting for my car to arrive so I can get at it!Main thing I dislike about the nav is that I haven't found a good way to find something other than by address.
That said, I really like having a built in system, since it means -- no worries about theft, no power cords dangling, no mount either blocking the windshield or an air vent, etc.
Now if only they'd just license the Garmin software it'd be awesome.