Can't really evaluate flats without talking about tension, so disregard all there posts that fail to do that. As I recall, and I haven't used Fender flats often or for long, the Fenders are fairly high tension compared to TI's, which are very loose compared to Pyramids, D'Addarios, or LaBellas. They can be pricey, but you want to try a few different brands. I have several basses and three of them have flats (different brands). I liked the Fenders, though, and a lot of folks prefer them to lower tension brands.
