I have them on a couple of my basses now (Including my Jazz bass and my fretless P bass), and enjoy the sound they make. Awesome strings. Like you, I wanted a less brite, more rounded sound. Just what the doc ordered.
Ha, they're definitely not as bright as Roto 66s (played them for years). Glad you gents like them; I really like the longevity that I get out of a set of them compared to other sets when I'm heavily gigging. The tone just stays.
We make strings. People play them. They rock.