These strings turned out to be a positive life changing experience for me, lol.  At least as far as my Seagull Coastline S6 Burst GT is concerned.  I had tried like a dozen different strings on this rig over the past 5 years, and even replaced the plastic tusq hardware with custom bone from Bob Colosi.  But never found a string that sounded, or played, just right.  It always sounded a bit tinny to me unless I went up on string size which of course reduces playability.  But these strings cured all ills on this guitar.  It sounds nice and rich, and plays really nice.  I had some concerns that I would lose too much volume with these strings, or they would sound too much like nylon.  Nether of those concerns came to be.  Also, don't let the "Folk" label fool you.  These are very versatile strings, and have a smoother surface than regular steel making them a bit quieter when your sliding your fret fingers around, and moving bar chords.