Thomastik-Infeld Steel/Nickel Flat Wound Light Steel Core, .010 - .038, KF110

by far the best strings

Always preferred wound 3rd string, but having wound 2nd is heaven! Only set of strings I have bought in 50 years that sound great, feel great, have perfect intonation, hold tune immediately, and yet have the tension of round wounds. Naturally, also the most expensive I have ever bought, but well worth it. I love em! Got to spring for 2 or 3 more sets now. I used them on a PRS Custom 24. Great for any kind of music! Be sure to wind cloth end wrap into the tuners to prevent breakage, think they could separate otherwise.

My all time favorite on any of my Guitars.

Very good strings. Worth the money. Tone is excellent. I'll be buying them again and I would recommend them to a friend.

These are excellent strings for playing folk music on an acoustic/electric guitar. I use them on a Martin OMC-1E with great results - the base register is not too heavy with an strong melodic line for finger-style play. And, they are very easy in the finger tips.

For a long time I have wished for guitar strings having more brightness and sustain than nylon, but well short of the hard metallic brightness of the spring-tempered steel of standard music wire. My model in thinking about this was softer metal strings, such as the brasses and bronzes used in some other instruments (I mean solid bronze or brass, not steel overwound with something). The trouble with strings of these softer metals is that they don't have nearly the tensile strength of the spring steel wire, and guitar strings need great tensile strength. [Consider that on a guitar you have strings covering a range of two octaves that are all the same length, which inevitably ends up calling for high tensions for the highest-pitched strings. Regardless of string thickness, if you try to tune a bronze string to the guitar's high E at the standard guitar length, it breaks long before you get up to pitch.] So there's a bit of a challenge here in materials engineering. I occasionally fantasized about trying to develop a softer metal string myself, but it would have been quite an undertaking, considering that I have neither the education nor the resources for such a project.
Now I find these Thomastik-Infeld strings which are indeed made of softer steels. They don't sound quite like alternative sound I had in mind, but they seem to reflect a similar thinking. How the Thomastik people addressed the tensile strength question I don't know, but they clearly have been successful in creating a warmer-sounding string of softer metal, suitable for guitar.
I do love the sound of these strings and my appreciation goes to the manufacturer.
Added bonus: because these strings are made of steel, unlike either nylon or brass/bronze, they work with magnetic pickups such as soundhole pickups and other electric-guitar pickups. I like this sound better than quacky piezos.

These are wonderful strings! I wish they were available more locally. (for less $) But hey, they are well worth it. They sound amazing. You can slide up and down all six strings without that annoying scratch sound that most strings make. They feel really good. I've tried many strings through the years and these are my favorite. Thanks!

Without doubt the perfect string to go on my Michael Dunn built guitar. Beautifully balanced both lengthwise and across, full rich tone and correctly intonated at all points on the fretboard. Michael was so impressed he is going to try them out on another style of guitar he builds. I can easily switch from fingerstyle to pick and I don't have to worry about keeping fingernails. I unreservedly would recommend that anyone playing a classic bodied guitar give them a try.

These are the easiest-to-play flat-wound nickel steel strings I've ever used, and they last! I put a set on my new Taylor 214e in early December 2006 and they are still there, good as new! I play the Taylor every day and perform with it about once a month. Intonation is great, the strings stay in tune, and show no signs of wear. No other strings that I've played over the last 50 years have performed so well as these.