These are the most fantastic ear buds I've ever use, I actually refuse to buy any other pair. I've always loved Sony, they're one hell of a product reliant company. Sound Quality Hands down, best sound quality in ear buds that I've experienced. I've bought a TON of headphones over the years. No other sound compares. Comfort The one reason I never like ear bud headphones was because of the pain it caused my inner ear. I would even blister from long periods of usage. These headphones do NOT have any discomfort. They are the most comfortable headphones I've worn. Very soft, very small. Design I think the design looks cool & it fits really well. I like how there is the little rubber piece you can slide up as to straighter out & link together each ear bud's cord. I have the red colored model. It's great because they're hard to lose! Durability Excellent durability, they roll around in my pocket constantly & they've yet to shorten out. I've had the same pair for almost a year now.