I have purchased from them at least 10 times. I have also purchased from Big Als and Petsolutions.
If you are looking for good customer service go with foster/smith. I also would like to mention that you should stick with dry goods. Liveaquaria.com is pretty poor. They still have the customer service but livestock is in poor condition. I recieved fish with Ich and have heard many other complaits.
Something to note Big Als will beat all internet prices. So if your looking for a good price go with them. I have noticed they don't carry some items. I think thats because they know they can't beat a price.