GP headphone being closed, it's not true at all, means all the sounds around, and people around also hear the sound of the headphones.
Isolation: 0

However, the sound is very correct, very good bass but the treble is not top, but it is far better than a pair of earphones.

Pros: Good sound overall, very good bass, very low price, comfortable enough, the son of 6 meters which can be handy depending on use.
Cons: Not close at all, treble low, 6 meters of wire that can be annoying under certain conditions.

You doubt that I would do no such choice.