Pros:

• Haha, I've got quite a few friends that are right into this app!
• Genius idea... merging geekdom and fitness.
• I run 3 times a week... and I hate it... it's so boring... apps like this really do distract you from the discomfort.
• Great training for the zombie apocalypse... rule #1 in Zombieland... cardio.

Cons:

• So weird that it's $4 for iPhones.