He has built with those guides already, and I have had the pleasure of using the rods. On a spinning rod they make an incredible difference, my next rod will have them. On a casting rod, they make a negligible difference, in my opinion.
Garry builds a nice rod, and is able to customize it to your specific needs. There are other builders here that are equal in quality and knowledge, speak with all of them and get the rod of your dreams.