I decided on the Forerunner 110 with a heart monitor. I wanted simple, but something that would give me splits and pace, etc. I think this was the best choice for me. Other people I know have the models for triathletes or cycling, but that's not what I needed.
I decided a 10 mile run would really be a great time to test these two tracking devices side by side. So on my saturday run this weekend, I started Map My Run and the Garmin at the same time / same place and off I went. I had the iPhone app telling me in my ear when I hit each mile and by the first mile marker on the Phone, my Garmin said I was at .91. Scroll down for the final tally...
Needless to say, by the end of the 10, I was WAY off.
This is better than the 13.1 vs. 14.9, but still quite a bit off. Calories are quite a bit different too.
Garmin 789 vs. MapMyRun at a whopping 1406!
With that big of a difference in mileage it changes everything. Pace and split times were totally wrong and I was not running as far as I needed to be for my training runs.
By this alone, I will continue to use the Garmin, but there are other features I really like.
--It was very easy to set up and start using.
--I really like the heart rate feature. (I'd always wondered where I was with this)
--It's super light. I like not having to carry my heavy phone.
--The heart rate feature is awesome
--The online tracking has lots of info and graphs for splits, elevations and heart rate.
My only issue has been connectivity. I have a MacBook and it doesn't always recognize when I connect the Garmin via USB. I'm going to be keeping an eye on this one and call support if needed.
I hope this helps if you are on the fence about a Garmin, I'm excited about continuing to train with it! I've used it several times now and very happy with it's accuracy and performance.