They take the edge off any bumps. But make sure the pads breathe a bit, especially hip pads in pants: unless you want the gentleman's vegetables steamed.
IMHO the best leather wear is hand made by Langlitz Leather in Portland, OR!
Many police departments ride with their custom fit jackets. I have witnessed and investigated a number of motor cop crashes and this jacket protects superbly. I have had mine for many years and still wear it on rides where high heat is not a factor. Tis heavy and hot over 85 degrees. Textile mesh are more comfy, lighter and cooler. Textile crashworthiness is unknown to me.