I have used these on several projects in recent years. Used with Rockler's shelf pin jig and special spring-loaded drills you can't beat this system. Once set up you can drill a couple hundred evenly spaced hold in a few minutes.
Pins worked great for shelves in a custom china cabinet. Nice shug fit into a 3/16" hole. Used pin as is for a wood shelf and slid a piece of 9/16" long, clear tubing over pin for support of 1/4" glass shelves. All worked and look great.