To be fair, it's the only GPS watch I've used for running, but in the past I've used a) my car odometer, which obviously has accuracy issues, particularly when you get to tenths of miles or less, and b) my phone GPS, which works OK but it sucks to carry and my apps would always glitch halfway through a run. The Garmin solves all these problems and is at least consistent run over run. And I generally run 100+ miles per month, so I spend a lot of time with it and it's important to me that it's accurate.