This is my first set of flatwounds; they are on my acoustic, full scale bass guitar. It took a while to get used to the extra string tension, and they were actually rougher on my right hand as well. I started using them for just a couple of songs at a time until I got used to them. I love the sound, it's quite different than round wound strings. While they don't sound as much like an upright as I was hoping, they sound beautiful anyway. They don't produce as much sound as acoustic strings obviously, but as a bass player I always use an amp when playing with anyone else.