Ran a long run with my iphone and was able to track my run, listen to music and feel safe knowing i could call if i couldn't make it back or a dog tried to stop me. I was exhausted but exhilarated when I finished the 13 miles on a sunny day in March (very rare in Michigan!). So tired I thought i would use my iphone to take a photo immediately after i stopped (in-case i needed to document my last steps:)!) I usually don't worry about recovery but after this run i downed some of my husband post-run drink and then sat in a cold ice-bath for 15 minutes. i don't think i would have ran as far that day if it wasn't for the sun and my iphone.