I dont mind the whistling because Im generally playing my music or the radio pretty loud. However, they seem to have gone even further south in terms of quality. They are very comfortable and have a slight bounce with each step. Easily and by FAR. Cons: None. The didnt open up and they still work beautifully. Works with Google Assistant. With Amazons shoe selector system, I ordered the 9. The price was right and you get two. First the color above all!