When I saw these strings I thought it was the usual cheap stuff. It was about 3,6 ¤. Then I noticed they were Pyramid, which is a fairly respectable brand, which I've already known. I picked a couple of sets and mounted them on my Les Paul. In terms of sound they really don't have nothing less then anything around (among popular brands). Very good sounding strings. They tend to be a little fragile, by the way. The E and the B strings broke after about 20 hours of playing. Furthermore, they are not the most comfortable strings ever. Anyway my advice is to buy more than one set at the time, because they can break. But the sound is incredible for the price. Still better than most of strings out there. And the price itself allows you to buy sets in large quantity. If you change strings quite often these are the strings for you: you'll get the most out of them.