Thomastik JS112

After my first discouraging encounter with flatwound guitar strings that were made by another well-known manufacturer (they were as dull and uninspiring as soaking-wet ropes), I decided to give these a try. I have no idea how those Austrians are able to make them this great, but I know that I will never use anything else but these 12s! Not only do they sound amazing, but they also do not seem to need much (if any at all) stretching out before playing because they hold their tuning really well right from the start. Personally, I like them even better after two to three weeks of daily playing because then they seem to become a little bit more flexible and mellow.
Finally, despite the packaging claiming that the ends are silk-wrapped, the wrapping is not actually made of real silk (according to the manufacturer), so these strings are suitable for vegans!

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.