The first set of PRS strings I got with the PRS, that I bought a few months ago. The strings which have been on the guitar lasted very long and sounded good, too. Because of that, I ordered the Strings again and I'm very satisfied with them. Especially the feeling of the Strings is good. They feel "fresh" very long. The bad thing about the Strings is, that they're not sealed. So there's no use to buy them stock.
PRS doesn't manufacture their own strings, they are made for PRS by D'Addario. But as these are the same strings that all PRS instruments come with from the factory, they are quality and about as a good as you'll get in terms of longevity without spending a lot more and going to Elixirs. Remember that PRS need their instruments to play really well and sound really well on the shop walls so their choice of string is important. That said, obviously you don't need to own a PRS to use these, either!
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