Anybody use Diamondite's glass cleaning/protection system or speed clay?

I've been reading very good reviews on their glass system. It's a 3-step system that first essentially clays your windshield (although it uses a chemical foam rather than an actual clay block), then cleans it thoroughly from everything the clay picked up and anything else, and then finally polishes and protects it by smoothing over all of the peaks and valleys and putting a protective layer over the top of the windshield.

All the reviews I've been reading basically say "you remember how car windshields look in a car showroom? That's what your windshield will look like after this stuff". The protectant most people report to last between 6 months and a year... kind of like Rain-X, but better.

I just ordered some so I'll try to do some before and after pics, although my glass isn't really that bad... it will probably be a good test to see how much difference this stuff will make on an already good windshield.

http://store.yahoo.com/streamlinedistribution/diamondite.html

I've had good luck with Zaino Z12 and sealing it with Z5. I'll post it on a detailing forum and see what they say.

*EDIT*


http://www.autopia.org/forums/showthread.php?s=&threadid=18731&highlight=diamondite

and another not so good review....

http://www.autopia.org/forums/showthread.php?s=&threadid=30145&highlight=Diamondite+Speed+Clay