I live by my GPS!!
I Love it!
My in the 301 Garmin so it has heart rate as well!
Funny this though, when I look down and it says 10 minute mile hahaha
I just shrug and keep on truckin ----- it is supposed to make me go faster but I just don't wanna right now
(BTW, How long can I use the Ironman excuse for my slowness and lack of enthusiam)?