Wow. These strings are fantastic! After the frustrating string installation process i finally tuned these strings up and they sound beautiful. Bob Gollihur sure was right on target about these strings. If any one is hesitant about getting these strings -do not be. They are exactly what i was looking for. They are so easy to play and i havent even broken them in but they already sound amazing. I heard rumors of them being to bright - but on my kay bass they sound very warm. These strings have all of the advantages of spirocore strings but they are so easy to play with the bow. These strings sound very good for arco and pizz.