"Overall, we are very impressed with the performance of your brick in the homes that have been built with it.   We have just had a house built with Black Walnut and the colors are better than ACME's compatible brick - a very competitive brick in the marketplace.  The Black Walnut is sculpturally perfect in comparison.  We are somewhat amazed. " 

"Please don't take our praise as a weakness - but we find it hard to believe that a concrete brick can perform to a higher level than clay.  Especially when you match it up against the big boys."