Apple laptop power
Apple laptop power supplies have been and, unfortunately, it seems, always will be terrible. I went through 5 in 3 years on my G3 Powerbook, 2 in 2 years on a G4 iBook and I am on my second in 15 months on my mac book pro. It is pretty much my main reason for buying apple care, so that is an extra wedge of cash for apple upfront for a terrible aspect of an otherwise good product.
What seems to be inadequate is the strain relief grommet. They end up not doing what they should and allow the cables to fatigue and short and this has been the case from time immemorial. They may not look as pretty but the grommets on the Samsungs I use for windows never seem to fail.