henry copeland: Why mess up your personal tracking with 5-7 minute of missed data? pllqt.it/VTzys8Now for the bad news: the GPS latch on is very slow on the 15. Whereas I’ve had some issues with my Nike+ watch picking up GPS satellites within a few long minutes after I started running, the 15 picks up satellites about five to seven minutes into my runs, which reduces the distance travelled in my records. Arguably I am in the middle of urban Brooklyn where the sun rarely shines and a clear view of the sky is often marred by chimneys, water towers, and gibbets from which depend AWOL sailors who strayed too far into pirate waters (not really), so GPS signal lock-in is difficult at best and impossible at worst. That said, you should take special care if you intend to use this unit in a big city.