lots of folks swear by them but they've been out less than two yours
Sure, that's because they purport to do for $ what other pumps do for $$$. And spending $$$ doesn't guarantee longevity just like spending $ doesn't guarantee a short useful life. I think most people look at things mainly just in terms of the initial purchase price, and don't really consider how many times something will need to be replaced - or they don't last long enough in the hobby to wear out even cheap equipment. I've got a few Jebao power heads at home and certainly hope they last a good long time.