Our jaws just droped when we first heard this headphone. You have to understand how bad cheap, big, sealed cans usually sound, but Sennheiser got it amazingly right with the sound of these cans. Sure they are a bit uneven, but they just sparkle and sing in an unusually good way. These are the perfect headphone to give as a gift because the reciever will always be amazed at how good they sound; and they are the perfect headphone for comercial uses like museums and dental chairs first becase they are cheap, and then because your clients will appreciate the plesant experience of good sound.