I have it for a long time and it still works well, but feels a bit cheap - the feel of the plastic and plastic's imperfect shape of mine adapter is the reason I feel this way. But it does it's job. If you need it for casual use, there is no problem - it is reliable and it is replaceable - you are not afraid to cause any damage to it, since you can buy it for such a small price.
I use it mostly if I need to connect some cheap phone headphones to my audio interface outputs, so I can hear, how the average phone user would hear the music I am producing and compare that to the mix I created with a better set of headphones (with a better connector).
For studio mixing or professional stage use (attaching to professional cables), I advise buying something better, so you don't diminish the quality of your sound.