These strings have a "brighter than Nickel, less raspy than Stainless" quality to them. They do not shred your fingers or frets, stay in tune, and hold their tone really well. Tension is great; enough "bounce" without ever being floppy. I personally prefer the "piano" tone of stainless but hate their abrasive quality coupled with the quick dropoff of tone. These strings, in my estimation, strike the perfect balance between the tone of steels and the playability of Nickel wound.
D'Addario NYXL Long Scale Super Light 40-95
Steel hex core with nickel-plated windings