I use these strings for about a month and my god what SON !!!!! me who loves to play in picking / blues are the strings idalie. it is true that the price (20) is consquent but as a measure it is clear that the ca is. it is on the need to get used to the rope lines that slip a bit (the protection that makes the strings last a long time) but for the picking / blues is wonderful !!!!!! I do it again this choice all my life !!^_^