Been using D'addario Pro Arte strings, and tried many others, in my 20+ years of playing classical, but from the first touch with these Knoblochs it was clear that the quality, feel and sound were all a huge level up from anything else out there. It feels like I've got a completely new guitar in my hands, the sound is open and so much easier to produce, the feel is very solid and not at all slippery like in other strings and even the duration is superb, lasting for months. High and mighty recommendation for anyone who hasn't tried Knoblochs yet, easily the greatest set of classical strings that I've ever played with.