I'm a recent convert to flatwound strings, the tone of which I find really classy. You'll maybe know that flatwound strings are becoming very popular with electric basses again, the reason being that they give a smoother, very punchy and warm tone which is much more focused in the fundamentals.
You are maybe thinking that with a guitar they would be too "jazzy", for a lack of better terms...well, let me tell you that they are much more versatile than you would think, they have a nice full tone which is to die for even with distortions and overdriven tones, too! This set lets you experiment even with lower tunings, thanks to the bigger gauge and higher tension. I love these