You can't beat some of their dry goods prices, like on salt especially if it's on sale. It's also nice to get frozen food and basic stuff like snails shrimp and urchins without paying shipping!
I've had good luck with corals from TFP, they usually have a pretty good selection of LPS (hammers, bubble, brains). Not a lot of good acros, they just don't have the lighting to support it. Their prices are not bad, and you can see what you are getting. I've had OK luck with their fish, although I think you need to be picky and I know a couple of people who have had bad luck. They always have some fish that look pretty bad as well as some that look fine.
If you do go, leave a couple of hours to walk around. I can never get out of there quickly.
