I have no idea what is so different about this cable from all the others I've ever used, but I cannot seem to get it to stay connected.  I have two of these, and even though they are pushed in completely (to where they "click"), they seem to always be coming JUST loose enough to lose connection.  For example, I have my computer connected to my router with this cord, and if there is any movement from either end of it, it will disconnect, and I have to give it a little shove into the computer or the router to re-connect it (it never comes OUT, just doesn't stay tightly connected, I guess).  Thankfully these were quite inexpensive so I don't feel as ripped off as I might if I had paid more, but it is still frustrating.