Exactly. Right until the comments in this thread I've been wondering why so many people complained about Macbook's and iPhone/iPods chargers cables, now I understand. When I got my first Macbook, I realised rolling it nice and tight put a huge strain on the cable, and I got into the habit of leaving it lightly loose on that first one. And that was it, and since then I had forgotten until now. Also, I rarely (if ever) unroll more than 25% of the cable, I just use longer or shorter chords plugged to the charger if I need longer span.