When I became disabled in 2007 and was able to resume any type of shooting, my children purchased me an ammo broom (ammobroom.com), which appears to be identical to the brass broom sold by Caldwell, except for color.
At one point, I had misplaced the bucket device that spreads the wire basket allowing the brass to drop free of the broom. I reached out to the company to try to purchase a replacement part, and they sent me an entire brass broom with my missing part, at no cost.
The brass broom is very effective on concrete and packed dirt, and about 90% effective on grass. When I am actually a line RO at a GSSF match, I am able to spread ot a tarp for retrieving "lost brass" during the event.