I picked up a box at RAP Chicago and so far am really liking it. Stacks easy, and the coralline algae colors on the rock make it look great right out of the box.
The thing I liked most about the rock is after its made, they run it in fresh water for 12 weeks to cure, and then put it in a huge saltwater bin for another 12-16 weeks. When you open the box the rock is actually wet (moist and wrapped in paper) So it's already semi-live when you get it. You'll still want to cycle the tank like normal.