I just put them on my L-2500 and I'm really quite happy with them. They have some tackiness that I had expected to interfere with my fretting hand, but have found that they mess with my plucking hand more. I've only played for about half an hour with them, but I can feel the tackiness subsiding already (or I've adapted ). Up to this point I've only had the D'addario Nickel Rounds on my bass. The half rounds are far less trebly, and seem to have more sustain. It seems to make the active setting on my bass a bit more manageable as well. I'm really happy with my basses new sound.