bottom line... great little headphones for the money. Need lots of bass? Need to seal out the outside world? It should be obvious that these aren't for you.
But if you want some inexpensive, decent-sounding, efficient headphone you can afford to lose, these may be just the ticket. Buy 3 or 4 next time these are available and throw the extras in a drawer for when you wear out or lose the first pair.
They seem to be very similar to my old Sennhieser MX400's in appearance and sound.