Buried in the main Windows Mobile app menu is the Flight Status widget. This lets you search for flight numbers and track their status. You can also browse local airports and set them as your destination, save them to your favourites, and even look up the weather in the vicinity. All very useful stuff, particularly if you drive a taxi on an airport run for a living.
When used as a sat-nav, the M10 performs as expected, with adequately quick screen updates and rerouting. The 3.5in display is noticeably smaller than a 4.3in widescreen, and can be hard to see in bright sunlight even if you turn the brightness right up. We also encountered instability on one occasion but generally the M10 performs as well as a standalone sat-nav device. When used as a smartphone, you'll scarcely notice that this is a fully fledged personal navigation device as well. You can access email, read and contribute to Facebook, and perform all the usual tasks. In this respect, the M10 is a very standard Windows Mobile device, with no skinning or widgets beyond what we've already mentioned.
At around £350 for a sat-nav with full Western European and some Eastern European maps, the Garmin-Asus nuvifone M10 isn't cheap compared to a standalone device, even one with connected services such as Garmin's nuvi 1690. However, it stacks up reasonably well compared to an Apple iPhone with a premium sat-nav app such as TomTom's, or even a top-end Android handset running Google Maps Navigation. So, as smartphones go, the M10 is relatively run-of-the mill. But it's decent value when the sat-nav abilities are taken into consideration, particularly the solid windscreen mount included in the box, and the navigation is well integrated, too.