The watch is great, I've been using it for regular long distance runs for nearly a year now. As well as when I'm out kayaking. It does everything you need it too, only issue with it is the size of the wrist tan line it leaves behind!
Top Marks for the Ambit 3 Peak
I upgraded to the Ambit 3 peak to get the extra battery life for long runs. I can now get 16hrs battery with the GPS recording at 1 second intervals & upto 50 hrs when its recording at 60 second intervals.
Other features i like are the Altimeter & Barometer, which both help when heading up Munros you can tell how far off the summit you are (when you can't see anything) & if the weather is steady or about to take a turn for the worse.
You can personalize the screen to show the information that's relevant to you.
It also does a load of stuff that i don't use, can link to your iphone for messages etc.
All in all, it's ticked all the boxes i had & more.