I recently bought a flamenco negra but all strings sets I had sounded dull on it, sound was not coming out, it sounded like a chamber classical guitar. I saw these strings recommended on a forum and when i saw them available here at Thomnan, i went to the website of luthier to chose the right tension : the pink is the lowest. I gave it a go : very good decision! . Now, the guitar is back to life, strings are snappy and sound is airy and also bites. The strings feel just wright, not sloppy, high strings have the right size, fit and tension under the nail.Thank you Thomann for the affordable price, my guitar growls and sings.I will stick to them.