So far, I really like them. I've tried three different types of flat wound strings (Fender, D'Addario and La Bella) and all three are strung on respective basses in my arsenal. I play the one with the La Bellas the most. They aren't as rough as the other two strings and the tension is lower, which I'm enjoying thoroughly. The sound of these strings at first was ok, because they had a fair amount of top end so I'm waiting for them to break in and I know that they'll sound even better. Right now they sound good and I'm using them on my MiM Standard with Basslines SPB-1 pickups, and I like the combination. I gave 'em 4 stars cos of the top end, whereas I was used to the Jamersons which were already broken in, to some extent, and didn't have that top end.
All in all, I'd recommend these for someone who wants a good set of flats at a decent gauge. I admit I'm growing to like them more than the other brands I use, so we'll see what happens then.
These strings aren't for slapping, but that not what you buy flats for anyway.
I live in Canada, and I tried to buy these strings for three months close to home, finally I was told that the strings had been discontinued, so maybe I'd like to buy a different string that they had in stock. That night I ordered them from Just Strings, and had them in my hands in just over two weeks. So big thanks to J.S. for the great service and great strings. Mike.