I can't speak for other software but iGuidance's POI database sucks. Did you know that between version 2.0 and 2.1.3, they've managed to add 21,000 POIs. How big is that? That's like ONE POI for each city in the US the last 2, 3 years.
Notice how they don't advertise their total number of POIs while software like Street Atlas and Streets and Trips are boasting millions?