I had a buddy give me a sigma these strings brought it to life wonderful bright sound!!
I like these strings a lot ----- on the right guitar. I find 80/20 strings to be a little more bright than PB versions, but they mellow out pretty quickly, perhaps after 5 hours of play time. I don't think they last as long as PB strings and I don't find them to be my preferred choice on Rosewood/Spruce guitars. However I do enjoy them on Mahogany- and Redwood-topped guitars where them seem to draw out some beautiful tones. I think these are well made strings and always have several sets on hand. As always, you can't beat the service provided by the folks at Shoreline. They are my preferred dealer.