I've tried out many flatwounds over the years: Chromes, TIs, LaBellas, Roto monels, groundwounds, Fender flats and more...
I really like this. I find them totally comparable in terms of finish quality and sound with the strings by major brands. I find the tone is better then Fenders and the sound balance between strings (volume, sustain, tone) better then LaBellas. I don't use LaBellas and Fenders even though already have them, I still use these. And all this for a quarter of the price!
I don't like that many users say they are good "for the price". There is nothing "budget" about these strings, they're be great at 3x their price.
If you're considering getting them: just get them and try out.