I took my old '62 Jazz and put some TI Jazz Rounds on it I had at the house. Struggling to get a Jazz tone I love (full an thick, not hollow--big lows and odd upper mids hollow), these seem to be working after a couple practices. After a bunch of strings and various settings, the TI Jazz Rounds seemed to be the most pleasing adjustment I've made thus far. I remember playing and thinking: "I like this!" Not, "I need to turn a knob or get these strings off when I get home." I love flats but the TIs Flats just didn't seem to do it when I tried those a while back. Cobalts were good for one practice then after that I started looking again. The Jazz Rounds are a forgotten gem for the moment, but I hope it lasts. My '71 has GHS Precision Flats and sounds pretty good, so I'm not making any changes there for the time being.