They do sound pretty good but don't you find them rough compared to other nickles like D'addario?
I didn't. But roughness has never been something that bothers me so maybe they are. Whatever it is I liked the feel of them. I've never compared them to D'Addario specifically because I've never been wowed by a string from them enough to consider playing it. I was using Sunbeams, and Dunlop Nickel Super Brights as well at the time and had no issue regarding feel switching between any of them. Tension/Stiffness was the most noticeable difference. Regardless, if a string is a little rougher or even stiffer or looser for that matter it's not going to steer me away from it for a string that to my ears doesn't offer better or at least the same performance and longevity.