I've played round core strings by many different companies and by far, Curt's are the best!
Was looking for some round core acoustic strings. There's two other brands I normally use, but decided to try these because the price is about 50% lower than those. I had never heard of them before. I was amazed by the quality of these strings. They are well balanced and have a great sound. I played the heck out of them for a few weeks and they still sounded great. I first put them on my working guitar (the one I use to practice and figure out licks and melodies on). Worked great, so I tried them on the guitar I use for my performances, on my last two gigs and they performed superbly. I only ordered a couple of sets first because I'm always skeptical, but after trying them, I bought six more sets. These are my new "go to" strings. They really do sound great and are long lasting. I would recommend these to anyone looking for great sounding strings at a reasonable price.