When I received these IEMs I tested then and wasn't very impressed with the sound, not a lot of lows or highs, but I was willing to deal with that as the sound is usable from a practical point of view, they appeared to be quite durable. However that proved not to be the case after one day of real use when the left driver stopped working altogether. Kinda disappointing.
They do come in a nice little case with plenty of extra plugs in different sizes, so there's that.