Some of what I didn’t like:
POI search results are in a list showing only distance from current location, without giving any more details about where each one is located. You can chose which POIs show up on the map view:
http://i1306.photobucket.com/albums/s561/GoneNomad1/TomTomScreenshot_2013-03-041_zps84e35ffc.png
and they show up like this (when viewing the map):
http://i1306.photobucket.com/albums/s561/GoneNomad1/TomTomScreenshot_2013-03-042_zpsdc420f69.png
as subcategory icons, although logos show up in some cases.

But if you want to search for a POI by name, after choosing “search POIs” and then typing in what you’re looking for, you get a list like this:
http://i1306.photobucket.com/albums/s561/GoneNomad1/TomTomScreenshot_2013-03-043_zpsa4ca4b7a.png
which shows only how far each one is from the current location (without even the address that shows up on some PNDs, or the arrow showing direction that you see on Garmin PNDs) even though there’s plenty of room on this screen for more information – on a tablet, at least, but most of these apps are rarely ever truly tablet optimized.
You have to pick each POI, one at a time, to see it on a map, and when you do that, you get a map like this:
http://i1306.photobucket.com/albums/s561/GoneNomad1/TomTomScreenshot_2013-03-044_zpsaa57cb61.png
which does not show where that is relative to the current GPS fix, and does not allow you to scroll/pan around in that map to get some idea of the surrounding area. If you don’t recognize where that is based on the default map as shown in that image (as you might not do if in an unfamiliar area), then you’ll have to chose to navigate to a POI just to get a better idea of where it is. All of which is pretty stupid, but then again most PNDs work pretty much the same way, although some allow pan/zoom from the screen comparable to the one shown above. In this respect, Magellan’s PNDs are better, as they allow you to see something more like the “map view” screen above. And the Navigon MobileNavigator app is better too. I have a lot of screen caps of Navigon, and will see if I can find them when I have time.

BTW, that “Walmart” that’s at the top of the list above, and on the subsequent map image… is bogus. There is no Walmart there (never has been), although there is a Sam’s Club not too far from there (google had it wrong for many years, but after about the third time I notified them, I think they finally fixed it). At least TomTom does get some others right that Garmin and Magellan have had wrong for years. But all these apps and PNDs have problems with POIs. Fortunately, I know how to find these flaws (and a lot more) and that’s exactly what I look for when I put an app or PND through its paces.

Another area where Navigon is superior to TomTom is in picking an alternate route. TomTom allows this too, but it’s much more cumbersome than in Navigon. But neither one necessarily offers the choice of the alternate route you may have actually wanted, and neither allows routes to be changed by dragging them (like google maps, or S&T). In most cases, the alternate route can be forced as you’re driving, simply by driving the way you want, usually at the beginning of the route, at least for short trips. For long trips you’d most likely have to make it a multi-step trip by adding waypoints.

In some circumstances, if you go off the pre-planned route, TomTom keeps trying to make you turn around longer than it should. It doesn’t always do this, but one way to uncover this is to plot a route that takes you onto an outer (access) road roughly in the middle of two freeway entrances, and then chose to turn the opposite way as on the preplanned route (since either way will work) – in this circumstance, TomTom takes longer than either Navigon or CoPilot to recalculate a new route, and until it does that, it keeps telling you to turn off (not turn around) longer than it should.