Pretty awful
Aside from the interface and battery life problems rightly highlighted by other happy users, GPS reception is so choppy (as pointed out by others, as well) that I am regularly given driving instructions for a position situated a few hundred yards away from my position, which can be slightly distracting when you are trying to figure out your way - and this does not happen in mountainous or dense urban areas, where interference and poor signal could be blamed. I have also been sent a few times towards one-way streets, and driven on concrete/real roads which, according to Tomtom do not exist, making me an instant explorer of sorts, in the Belgian countryside.
My current grudge with this nice piece of software is an update for iOS4 compatibility: the whole product apparently has a 1.8GB footprint, and WITH THE APPLICATION INSTALLED, I still have 2.6GB available on my iPhone 3G 16GB. However, bizarrely, when I try to download the upgrade, I am told that I do not have sufficient memory and am advised to delete videos and photos on my phone. If not fixed, I will be unable to travel with it for the holidays, which is the reason I bought it in the first place. TomTom declines to provide any help on this matter.
fab!!! about
TomTom Western Europe