I'm not sure how they manage to make a brass barrel out of solid steel stock. I guess they're alchemists?
I would prefer to have the trunnions fixed to the barrel, which you could do, or possibly request they do it for you. I also don't see any indication of them using steel sleeves. Not everyone chooses to sleeve their brass tubes, but I'm just pointing that out. To my eye, they seem to machine a decent looking barrel, and there are some aspects of their carriage design that I like, but I have no direct experience with any of their products.