Hi Amstar,
I buy in to their sales pitch. I bought a combination of dry rock and real reef rock when i got into the hobby last September. I know, not that long ago. I used it to start and cycle my first tank and the cycle went very quickly. The biodiversity that pre-owned/ocean-farmed or wild caught rock presents you with is absent but the bacteria capacity is good. True coralline encrusting is taking place over the pigment, I think Ha Ha,. I am happy with this synthetic product. Having said that I bought some pre-owned wet rock from Gerber's and really like discovering the fauna that it has brought to my tanks.