Some people will clearly value the peace of mind that they get from buying insurance cover, which is something that only they can judge the value of, I guess.
From the view of whether it's a good investment, however, I rarely think that it is for electronics, especially solid state. Most such equipment has a failure rate that peaks early, and then after a long time (depending on the life time of the various parts). If you get a 1 year warranty in any case, this covers most failures that are likely to happen until - for high tech items - the product will be well out of date. So I never buy such cover.
Having said that, I did have a laptop drive fail just out of warranty. On the plus side, now I've got a Mac
