I bought those strings as an experiment,since I was looking for the softest acoustic strings I could find.
Sound:As you would expect from 8 gauge strings,Extra Slinky lack in volume.That could be acceptable in recording situations,but can prove problematic when playing live without the assistance of a pickup or transducer.
I firstly tried the strings on my normal size acoustic.In my ears the sound was thin and especially lacking in the low end.Suprisingly though,I got quite a nice,balanced result when I recorded some samples,placing the mic in such a way that captured quite a bit of the guitar body.
Then I tried the strings on my tenor guitar.I found the sound to be just fine,probably because of the smaller soundhole,the fact that tenor guitars lack the two lowest strings and the "bassy" character of my guitar.
What I also loved,is that those strings are really quite.You can change chords,slide and bend,with minimal finger noise.