I used to run with Nike+ but app restrictions were so frustrating.
I do have Polar H7 to work with my iPhone 5, and unfortunately I could not find any bluetooth stride sensor.
Really dediced to give a try to Wahoo with this model, and I am so satisfied with it.
Installyng was a snap, very easy, and ... well... it works so great!
Ant+ is a great standard, but it would be great for Wahoo do deploy BT stride sensors as well - I also have a Wahoo BT Cadense/Speed for my bike and it is fantastic!
Go for this unit, but don't forget the Ant+ fitness key, otherwise it wont work