Been playing guitar for more than 30 years and tried all sorts of strings. I bought these because another reviewer recommended them for any kind of music, and I can honestly say this is the best strings I have ever tried. In fact, I was mildly shocked over the quality of these strings. -And I am no jazz player. I usually use heavier strings, so based on all the string tension warnings for flatwounds, I decided to order lighter strings than I normally do. I think maybe I could have ordered JS113 after all, because these had a slinkier feel than what I am used to. Both my guitar and I now sound much more refined, being able to project more nuances and dynamics in to my playing. They are extremely comfortable, with way less string squeal and noise in general. That said, all this comes at the cost of reduced bass response, loudness and overtones. But I found I could adjust my playing style to compensate for some of this. So in my opinion the benefits outweighs the disadvantages by a good margin. I would recommend anyone to try these. I would say they are worth it for the insight in the benefits of flatwounds alone.