I tried these strings once and never bought them again... They're just not my thing. I'm a convert to DR Hi-Beams and unless string technology changes drastically I don't think I'll be using different strings... ever... haha.
If I'm in a pinch and need strings but can't get DR's anywhere locally I'll substitue some D'Addario XL's (100-80-65-45), but definitely not the Prosteels. Sorry Naveed
