I agree Art, I have some old pieces from an order we did from reeferrocks and the shapes from MarcoRocks just blows them away IMO (yea, not to mention the sizes are immense).
Just to clarify, I specifically requested the larger pieces, and paid a premium price for them, specifically for the larger footprint of our new tank (and having it eurobraced, so no center brace to deal with). Although in the grand scheme of things the "premium" price didn't really add that much to our bill for the rocks. It maybe increased it 20% - 25% overall (when shipping and the smaller rocks are all factored in).
One thing that Marc did for us was picked up from fiberglass rods fmro HD there in his area, for very cheap, and threw them into the order and shipping box. This time of year they have tall driveway markers for outlinging your driveway edges in the snow drifts (They looked to be 24"+ tall). They are basically 3/8" fiberglass rods with a reflector on top and run about $1 each. Of course they are not available here in the Bay Area, but he was making an HD run anyways and picked up a dozen for us so that we could use them for connecting the rocks together, if needed. That way I didn't need to buy the expensive rod from those online vendors.
Marc also added a box of rubble, for a rubble zone in our new fuge that we are setting up. All in all he really went above and beyond with us and our order, and I know that ours is far from the largest tank or largest order that he has serviced, but he still made us feel "special". That is often lacking in dealings with many of the online vendors.