If a free kit: I think it's nice. I had more headphones, and despite what some people say, I find it rather nice. Regarding sound quality, personally I am not at all difficult, I do not feel the defects so it suits me perfectly. And one thing size: finally-ear headphones that fit well to my ears! More friction, it remains in the ear, and that's really nice. The various other bonus of this kit are unfortunately limited to anecdotal (except possibly reducing 5).
For a fee kit: do not buy, 30 is way too expensive for what they offer.
