From what they have it seems pretty good at loud and fast. I want to see some more intimate chorale-style writing, which is where I had assumed a library with individual parts sampled would really shine. The trumpets have a really nice shimmer on the top of chords, the tubas are very warm and full, the horns seem to be powerful but not too buzzy. I felt the trombones were weak but only because they didn't seem to get much attention either in the mix or during the walkthrough. For $599 though it seems worth it. Seems to be similar to OT berlin brass in a lot of ways but more flexible.