In less than a day the tune is stabilised. No other gut string does that. Clear sound, unmatched responsiveness. After decades of using Pirastro Oliv, this was the fourth set of Passion Solo that I bought and I find no reason to switch to another brand / product series. No other gut string keeps the tune and sound quality this long. The higher price paid worths every cent. Just do not forget to put some graphite on the bridge before the string sits on it, the outer wrap is very delicate. With good care (daily cleaning) the product easily lasts four months with daily 4 hours+ playing.