First off, the writing in this publication is second to none. The articles are interesting and informative, I love the range of travel destinations and routes they cover, and their roads tests are very thorough. My only issue with this app is that it hasn't been updated for the iPhone 5, causing content to letterbox on my screen. Once that's patched in, it'll be perfect.

Has pretty much every unit and conversion you could want, very easy to use!