So looking over the reviews, others have had the same problem I had and at first I too thought the problem was with my chord. On my iPhone5 I had three to four lightning chords and one of them was sort of scratched up. Thought it was my fault, so I just kept using the other chords. My iPhone5 WOULD NOT charge and I previously had to wrap my chord around or kept it in a certain way/direction for my phone to finally charge. Turns out that it WASN'T the chord at all, BUT the actual phone itself. Luckily my iPhone5 was still under warranty, so anyone who has this problem and is still under warranty, just go take it in and they'll give you a new phone!
In conclusion, my lightning chords all work with my new iPhone5 (including the scratched up one) and my iPad2 w/ retina display. I am giving it a 4/5 though because it was kind of easy to scratch the chord, but other than that, it works like a charm!