Summary: These are great headphones, especially for the price. The cheap Sony ones are not nearly as nice and don't have the warranty, etc with it. The expensive versions are not needed so stick with these. Sound is great and they are very comfortable other than for small ears (takes a minute to put on). The only downside is they tangle really easily and it's a pain when transitioning from a bike to a run and wanting to do it quickly.
Pros: Sound quality, comfort, ability to take calls while running
Cons: Doesn't fit well with small ears, gets tangled easily