Neighbors left so I was able to crank it up a bit and try so more noisy stuff. I can't say that I was overwhelmed, but there are some improvements over not having them. I would not go out of my way to build a setup like that, but it's free for me right now. With music, the larger the venue, the more it helped. Solo instruments, it's barely different, or even hard to be certain it's not negative. Orchestra starts leading to more "volume" of space. Pipe organ was more there. Makes the room sound larger than it is.
Again, not overwhelming, but I'm glad I thought about it.