They have a deep growl that just keeps me coming back to them after trying other strings, full harmonic overtones that blend well and the tapered string ends make the proper vibrations. Oh, they feel like stainless steel. You can get a lot of string squeak if you do not pay attention to proper fingering technique. SR2000 strings are strong and punchy in the production of each note. The tension is enjoyable to me, also. They make me stay technique proper, no sloppy playing allowed. And the price is acceptable to me. Hope this review helps.