Overall Pros

-highly accurate
-absolutely free
-records run information for later reference (speed, time, pace, distance, GPS location)
-allows you to set goals
-includes music options, and power songs for when you need motivation
-speaks motivational quotes every once in awhile to encourage you to reach your goal
-allows you to connect with social media and share workout results
-available in 8 languages
-easy to use and very self-explanatory