Agreed, if there is one thing that Apple are absolutely appalling at its power supplies. The amount of power supplies I've bought over the years, at £60 a pop is about 7, for two laptops over 7 years! And they ALL fail in the same way, with the either mag safe end fraying and sparking! or the cable cracking and exposing wires at the power block end (because of the stupid design decision to force a right angle bend when wrapping the cable around the pop-out cable hooks...)