I am interested in purchasing the AirPods, however I only use my current EarPods for running or when I am at the gym, the rest of the time I use B&W P5s. How do the current owners find the AirPods for this sort of thing? Do they stay in while running/moving about a lot? Is it annoying not being able to change song? Would you buy them if this was the only reason for the purchase?