Sound quality right out of the box is brilliant. I could hear new sounds from favorite tracks that I'd never heard or understood previously. App is more than sufficient for customization to your needs and the features on these are extensive. 2 year warranty and added bonus. Top quality. Sure they are not as lower profile as other earphones (Jabra), but function over form. After all if you cant hide it, accentuate it. Super pleased I got these and at the sale price, I'm stoked.