I think I ordered from the source mentioned above, and I just got it today. It looks incredible for base, it is very porus and very unique.... it is just white..
I initially wanted to go all LR, but after I bought 30 lbs, at $7 a lb for tongo and fiji and 20 lbs at $13 per lb for marshall island, I decided to add 50 lbs of base to seed in and fill my 75 gallon tank.
From a budget perspective, it can cut down on costs if you have the time, and dont have the money to go all LR. From a time perspective, it may take a while to get it covered with coraline and other stuff.
I agree if you add base, just seed it with base, and be sure to add LR as that will help the tank.