I use these strings on three nylon strung guitars, a Manuel Rodriguez BC1F Flamenco cutaway, a handmade Peruvian Indian Rosewood guitar and a Godin Multiac Nylon SA.
In the past I have used Savarez and Augustine Blue strings on the guitars but found that these strings break up after a reasonably short time even though they do sound good, it must be said.
There are a number of reasons I like these Daddario strings. They sound really good and they don't break up on me. They are a smoother feeling string under the fingers. The tones are very good on each of my three guitars. As the strings I use are normal tension, I find that the third string can lack a bit of precision on the Godin and feel a little bit loose, but that is a guitar with a very unique feel to the neck in terms of classical guitars. It tends to feel more like an electric guitar with nylon strings, which for me personally means a lot less stress for my hands whilst trying to play the music I like to play (finger style jazz amongst other things).
In terms of classical guitar, I think most players tend towards hard and extra hard tension, but for me having tried them all, guitar playing shouldn't be so much work that one should not be able to cut straight to the music as much as possible, and these strings let me do just that. I would highly recommend them to anybody looking for high quality, very reasonably priced, very good sounding strings for all classical style guitars.