I've only used Navigon North America, however I'd like to know others' opinions on it and other GPS apps like Magellan, TomTom, etc. For my iPhone 3G, Navigon usually runs pretty slowly. Like to from app tap until the app is usable without lag, you need a good 5-7 minutes (no joke). This process could be avoided by plugging the iPhone in to something, which is probably smart since the app drains battery life like there's no tomorrow (entire battery gone in 2-3 hours). POI database is very accurate, only found 1 mistake (a No Frills in Toronto located wrong). Apart from the lag, the only thing I don't like about it is that you have to go through like 10 screens before your navigation starts. I wish the address can be inputted all on the same screen (same box even), and the next screen is for confirmation and options, and then navigation. The iPod integration is unique, however you can't select which song to play, you have to make a playlist GPS signal is good, I'd say a 7.5/10. Always accurate unless I'm on a highway interchange. I have a Magellan standalone unit for the car and I really like it, but I don't know if the app would be worth it.