My father wanted to make his own set for his guitar because he has a bit sensitive skin (has bunch of skin problems, not to mention developing arthritis).

He liked flatwound strings because they aren't hard on the fingers but he wanted to try something new and missed the sound of the roundwounds.

He was impressed with the quality (they were removed and put back on on the guitar, I think, 3 times) and loved the coated feel they had. He claims they are not hard on his fingers.

They are still on after almost a year of use. I'd say he plays around 5-10 hours per week. Not bad I say!