CoPilot's user interface uses large, square on-screen icons, and although they weren't quite as pretty as TomTom's, we found them easy to use and more helpful-looking. Planning routes was simple and once it was done, we could use multi-touch to zoom and pan on the map, which is a massive win for CoPilot compared to the others.
CoPilot also includes some social-networking features, so you can share your destination with other CoPilot users or friends who are stalking you on the CoPilot Web site, which could conceivably be handy once in your life.
Like TomTom, CoPilot app often had a hard time determining our GPS position, but where TomTom won't let you continue until it gets a fix, CoPilot soldiered on. This meant we were sometimes left unsure whether our route was up-to-date or not, and we often missed our turns.
In our test, CoPilot was missing some map data -- for example, it wouldn't accept the street number of our destination. And it's own, shockingly awful keyboard isn't even Qwerty -- it shows letters in alphabetical order -- so we found it very difficult to type on. Other gaps in the application mean you can't browse the map without planning a route, and you can't plan a route just by tapping your destination on the map -- you must know the address.
CoPilot's multi-touch zoom and big icons were great, but we can't live without a decent Qwerty keyboard and map browsing.
Pedal-power rating

Click 'Continue' to find out more about up-and-coming sat-nav contender Sygic.
Update: CoPilot tells us that the latest update for its iPhone sat-nav app includes support for the iPhone's own keyboard. Chapeau!
