These timers are so milspec, aero-tech, race... whatever you want to call it cool, all made out of a block of aluminum and then anodized. Very industrial and a nice laptimer with a variety of mounting options. Big numbers are easy to read at a glance—a feature not found on many other laptimers. All fully GPS integrated and accurate, no pitbox needed. 

The GPS refresh rate of these is 20 times per second, much better than most standard iPhone and Android available laptimer apps. Plus you won't have to fiddle with phone settings and keys, which can be a nice thing if you like to wear gloves when driving at your local track.