I purchased the Forerunner 225 because of the wrist-based heart-rate monitor.
As a owner of a 410 (which I find often overkill, for my needs), I didn’t expect more.
I am surprised and delighted to learn that it includes an accelerometer as well. This means that you have, for free, cadence and stride length.
For a data geek, this means a lot of data to play with and, hopefully, some useful insights. More to come.