I was waiting since Dec 2010. At first it just seemed he had issues due to changing machine shops but of late I dont think anyone has been able to get in contact with them in months. Last I actually spoke with Mac was in April.
I went with the kryptonite centerlink,tie rods and idler support. Turns out the rest of my front end was toast-all 4 ball joints and hubs. I am still in the process of replacing these so I don't have any good seat time feedback other than the parts were certainly beefy.