I had the same concerns before I ordered my package but once you get the first order you will see, it is more than worth it. I have had several different kinds of rock before and even some I ordered over the internet but until I got my TBS I didn't know what beauty and life the ocean had to offer and right in your own home for your pleasure. I researched it too before I took the leap and I have no regrets.
The main thing is prevention. before you add your rock to the tank, use the seltzer water, have you some long tongs and when you hit the rock and all the holes with the seltzer they will come crawling out of the rock. For the few you miss you are just need to allow some time to catch any unwanted but it is a decision you will not regret. There is no guarantee when you go to the LFS you wont get an unexpected guest.
Richard takes a lot of pride in what he sends you and you can see that as soon as you open the box, it is wrapped up safe and secure like you cant imagine, everything is still underwater which is rare to find when you buy rock. this ensures all the life he sent to you will not only survive but thrive. if you have looked at all the pics you will see you don't just get rock, Richard sends awesome surprises too as an added bonus. If you have any questions or concerns any of us SATISFIED TBS owners are more than happy to answer, as is Richard. I have always gotten a quick response from Richard whatever the question, even on weekends, the poor man never takes a day off..