I have a Larrivee parlor guitar that I've strung with the Nashville Strings, extra light gauge with the bottom four an octave higher. IMO a smaller-body guitar like the parlor style is ideal for this stringing.

Mostly I've used it for finger-picking, with a bit of light strumming (with fingers, not picks) thrown in. I've been playing folk songs on it so far -- no blues or country yet.

To Bee, who asked why one would do this: It sounds soooooo pretty! The tone is kind of a cross between a guitar and a celesta (think "Dance of the Sugar Plum Fairy" from the Nutcracker) -- very sweet.