I am now about to go replace my second "L" shaped MagSafe adapter. This is going to be my third MagSafe. That does not count the two I had to replace for my old Black MacBook. I am hoping Apple will replace this one under AppleCare. This one is splitting and fraying. It is no longer safe to use, even though it is still supplying power. The last one just stopped working one day, but I remember a month or two earlier, a bulge starting developing near the MagSafe connector. To be clear, I generally take pretty good care of my MagSafe. I do everything Apple and others on this form suggest, short of putting a pen spring around it. I always leave slack on the base of the MagSafe when I am wrapping it up. I do the loop thing to protect the bottom end of the cord. I also only disconnect by holding the MagSafe. I DO NOT yank by the wire. I also give the wire plenty of slack when I am using it. I DO NOT wrap the wire under my computer, rather i just let it wrest on my knee. Yet my MagSafes keep breaking. I have noticed when I look around others have suffered from the same problem. Most MagSafes I see old are splitting and fraying. Take it further back I notice a similar problem with later iBooks and Powerbooks. This is a portable computer, the cord is expected to move around quite a bit. While being moved around it is going to suffer additional strain. But this cord does not survive being moved around. My only conclusion is poor design. The MagSafe is really thin, in fact it is thiner the third party cable I purchased for my iPhone. The MagSafe also does not have any strain relief, in fact the closest thing to strain relief is a very sharp edge on the bottom of the MagSafe. My PC Laptops have never had this problem and in fact I put them through far more abuse. I've owned a Dell, a Lenovo, a Compaq and an HP laptop (which also had a user replaceable cord), for all of them the cord lasted a very long time. In fact they all lasted longer than the laptop itself. All of them had a very thick cable plus good strain relief. So my question is, why is apple not designing better MagSafe cords?