I bought one when they first came out.
Or rather I ordered one, black and passive, and was sent a black and active.
Back it went, and a few weeks later I was sent a red and passive.
Back it went, then a couple of weeks later I finally received my black passive USA Sub.
I posted about it on the Music Man forum, in a thread called 'The bass they didn't want me to have!'.
This became the thread they did not want to show, because it was deleted.
3 times 😝
Anyway I really liked the bass, it sounded like a MM despite being passive, lovely neck, and wasn't too heavy. I only got rid because I play fingerstyle and the edge of the body was not contoured, and used to dig into my arm, eventually quite painfully by the end of a gig.
With hindsight I should have just chamfered a tad off the corner where my arm rested.