Which strings? I've used the Kala steel wound nylon core strings on my custom fretless acoustic and solid body bass ukes that are similar to the Pyramid versions and a lot less costly, but both I and our other bass uke player find them to be way too noisy, not jut the wound noise, but finger pulls and rattles. I prefer the Road Toad Pahoehoe poly strings because they have that stand up bass flavor. I also have similar scale magnetic pickup basses, but on those I prefer flat wound steel strings, I'm all about smooth sliding strings.