I'm just one week into this whole thing, but I did a whole lot of investigation before I definitely decided to go with Tampa Bay Saltwater.
I wanted rocks with diversity- I feel like the more critters I have going in there the better. Why buy extra "seeding kits" when you can get your basic biodiversity right there on your rock and in your sand? I made the rounds to my local shops and the rocks there were just barren compared to the TBS rock, not to mention much more expensive- even after shipping was factored in.
The folks at TBS are more than happy to answer any questions and help you out- we ended up trading phone calls for a couple of days until Richard was satisfied that my water/salt mix was stable enough to begin adding life. They want things to go well for you and have done just about everything in their power to see that their rock gets to your tank in fine shape.
My first half has been in the tank for one week today. I have not had ammonia or nitrite readings over 0.5 so far but did a water change today just to be on the safe side. I'm seeing more critters every day- although most of it is parts of critters- a tentacle, a pair of antennae, or a shifting piece of rock.
I'm sure I'll be just as happy with my second half when it is time. Then I feel as if I'm off to a great start in this fascinating hobby.