I'm surprised no one has written about them. They are far and away the flat wound string ever made for the bass. Unlike all other flat wounds they have a great singing sweet sustain and an incredible fundamental. They add a huge low end to your band. They are also the most expensive strings you can find. However, if you keep your hands clear they last for years. They are not the old thumpy sounds of traditional flatwounds and a light years ahead of any current flat wound. I've used them on my old pre CBS Fender P for over a decade, and old Fretless Jazz with Alembic Pickups, as well as an Alembic Epic I had. Mostly I used it playing big band when I didn't schlep my upright or when we played outdoors. They are real crowd and band pleasers. Carol Kay uses them exclusively. The disadvantage is they are not for popping and slapping. What is interesting is I also have a Pedulla Thunderbass. They did not work at all on the Pedulla. [Surprisingly the Pedulla seems to work great with Pedulla strings[/I]. It really needs light weight extra lively strings. They have a very long, very thin neck and really require lighter gage strings. But than, that's also a bass for slapping and popping. I'd like other options to try for it. I grew up before there was slapping and popping, and as a bass player some of it sounded great. I loved the sound track on the Seinfield show, then found out they used a keyboard to play that I do like a solo bass player popping and slapping. Generally, a band really sounds best with the bass player providing an incredibly fat fundamental. They don't care about a bass player showing off, they care about the sound of the ensemble, and the bass player provides the bottom end. Thomastic does that best. Also, on archtops, and other instruments for jazz, they make great guitar flatwounds, expensive but a great sustain and all around sound. Nothing like the flat wounds I grew up with, where you sacrificed sustain.