Went there at about 7:30 on Saturday night. It was pretty empty (just a birthday party of about 8 ppl at one table, two people at another). The waitress was nice enough, although service sometimes was a little slow. It's a cute little place with kitschy little signs all over the place and they played a good selection of songs (mostly kroq-y stuff).
Now, on to the food. We ordered mild and spicy crawfish ($6.99/lb). Both flavors were hardly spicy at all, the seasonings were pretty good, but more garlicky than anything else. Apparently, for every 2 pounds of crawfish, you get one corn on the cob, but you can order extra at $.49 each. Our order didn't come with sausage or potatoes either (add-on is an extra $0.49). Oysters ($12.99/dzn) were pretty good, but the clams ($8.99/lb) were pretty nasty. A lot of unopened clams, and the ones that were open were all empty (we found some of them at the bottom of the bag, but hardly making up for the pound that we ordered). We ordered an extra spicy order of head-on shrimp (sorry, didn't check how much it cost). The extra spicy was definitely spicier, but still, mostly garlicky than cajun spices. Finally, we had the dungeness crab (at a whopping $10.99/lb).
All in all, our meal came out to $100 bucks: not bad for 4 people.
Note: I've been to Cajun Corner and I like their seasonings better, but the quality of Rockin Crawfish' seafood was fresher and their crawfish were bigger and tastier than Cajun's. Looking forward to checking out Boiling Crab.