Okay, I wanted to give these strings a decent workout before I pitched in. I have had a set of Cobalt Flats on my Blacktop-P for about 2 months now. (The white package, which is not Slinky or super-slinky, but a hybrid gauge I guess. I like a heavy top, heavy bottom!).
Unlike some here, I had no problem with winding or string breakage. The first thing I noticed is the feel (I had come from LaBella Deep Talkin flats, and chromes prior to that; let me tell you- there is a night and day difference) and the string tension. Wow! Then I started playing them. Wow again! Without getting too long winded and emotional, I am fairly certain that I have found my new go-to string. Plus, they are half the cost of LaBella, which does not hurt at all. Now, I just need to see how long they live . . . .