I used it once successfully and when I went to use it a second time it no longer worked (the red light doesn't light up to signify that it's in the cigarette lighter as it had previously, and my phone does not register that it's plugged in. No amount of twisting or wiggling fixes it.). It doesn't appear like the USB goes in all the way at first, and if you push harder it splits the adapter in half along the seam (I attempted this after it had already stopped working). Basically, it's just really cheap plastic. Not worth me bothering to return it either. I guess that's what you get for $3.