Great for blues and roots. As a long time guts player (blues and slap) I wanted to try a string that would give me more presence in a live mix, with a more defined attack. I wanted to keep some of the dark thump of guts, and avoid the zingy mid range of Spiros. Overall I'm very happy with EPs - they've certainly helped me cut through the mix, with a slightly more jazzy tone, and a bit more sustain and growl when I need it. I've had to change playing style slightly, as they have less of the organic bounce of guts, and slapping requires a delicate touch. But I'm sticking with these strings for now.
