Longtime Sadowsky Black Label flats user here. I have regrets about not buying up a bunch of 2 particular string sets before they were discontinued/replaced. Those sets are- the original Fender flatwounds, as well as the Sadowsky Black Label flats. No current strings IMO have the same attack and classic tone as those Mexican-made Fenders (made by VC Squier, I believe). Also, no current strings exactly duplicate the nearly perfect combination (also IMO) of articulation, clarity, richness, and versatility of the “old” Sadowsky Black Label flats. I cant imagine the considerations that were factored into their discontinuance, but I’m sure they had good reasons. I have one used set of the old Fender strings left, and perhaps 4 used sets of the Sadowsky Black Label flats. As I said earlier, my choice for replacement flatwound strings has been Labella. Specifically the 760FL. Have used the TIs many many times and they are very nice, but a different flavor, and definitely requires a change in setup and adjustment in playing.