This is the first time I have purchased Prazisions. Putting them on was really easy. They tuned up and became stable very quickly. They slipped by a Semi-tone every five minutes for the first day I played them, but after that, I haven't had to tune them at all. They have brightened and focused the sound of my violin (which is a late 1900s Scottish violin). I have achieved more clarity and responsiveness with these strings. Granted they are not quite so good as Eva Pirazzi's I have played and the Larsens I usually play on but for the price you cant go wrong with Prazisions.