Well, as for distance, it does measure it via gps mapping. The distance I walked was definitely over 6.5 miles because it's normally 5 and I did a our 1.5 extra today by taking an extended route to see where a new bulldozed path led.
The odd thing is the time. It says 136 minutes. Felt more like 3 hours, but I don't see it screwing up on time. The sad thing is, 20 years ago, I could do almost double that distance in nearly half the time jogging. I was 50lbs lighter too. Sometimes I don't even know how I was that person anymore.
Personally, I can't wait for the dystopian future where insurance companies force us to share our fitness data and ping us for being fatties. Can you imagine in like 2050, your government issue citizen health band waking you up at 5am and telling you to get out of bed and go walk because you're not as physically fit as the rest of the ants at the factory? Gotta be fit so you can work hard and produce more widgets for the regime's war machine.