It is the most efficient rock for base rock use. I can not see the base rock in my tanks as they are covered with corals. I would cover the majority of the base rock with live rock in a standard conventional display tank housing fish and less corals. As I add coral I replace the original live rock with the new coral head, and therefore recover the base rock. The coral fills the spot quite quickly. Besides it doesn't take ling for the average reefer to cover their base rock, as it seems most of us are pretty obsessive and compulsive and our reef tanks become nearly an addiction. It doesn't take long to a mass 40 or 50 corals or even a hundred, especialy once you start fragging your own corals. Once your corals settle in and really start growing you have to either trim them or frag them anyway or you have to always remove corals due to the corals growth causing croeding. SPS Corals as big as basket balls only take a few years to get that size if untrimmed. That would mean only a dozen or so corals per tank. For the price I actually preferred the standard base rock that is advertised on that site, but it is no longer available. Seems the supplier found another purchaser who pays more and sells it at higher prices. It is sold now by the single rock and only the large rocks are presently now being sold. I ran across the site only once and foolishly did not save its location. The single rocks were selling for $75 to $750 each. They were large enough to use as center pieces. They were 2 to 6 feet long and a foot or two tall and full of holes. No different from what I had bought previously for $1 per pound, or for about 25% of the prices now charged by the new retailer.
If your wondering, I receive no gratuities from any retailers, suppliers or anyone in the aquariums trades and have no financial interests in the aquatic trades outside of Alaska.
I have just recently purchased some of the worm rock they advertise. Just Tuesday, actually, and have not yet seen it. I have ordered quite a few shipments of there standard base rock in the past, and hope they start handling it again , even at a higher price. It is even nicer than Pacific live rock and is much less dense. I do not buy live rock for coral remnants. If I want coral remnants I would just buy coral remnants or coral skeletons. However I quit doing that many years ago. That was back during the days when blazingly white bleached coral skeletons were the norm. I would take the dead coral out of my tanks every month and bleach them. Dead coral skeletons are still, for some insane reason, available on ebay.