Expensive but worth every penny
I drove over 2000km in Europe in the past two weeks and this app got me to my destination perfectly every single time. It takes the stress out of navigation. I highly recommend it. I use it on an iPhone 4 and it works very well. Tunnels would sometimes obscure the GPS satellites but any GPS has to deal with that. Buy it if you dont want to deal with paper maps, directions, etc. Best app on my phone.
Weightlifter about
TomTom Western Europe, v1.8