I liked the tilapia when I was there in February with my kids. They had the pizza from the kids' menu and didn't complain. And yes indeed the creme brulee is delicious. We're booked to eat there again in June and DH is eager to try the NY strip steak (he's not a seafood or fish fan like I am and wasn't able to go in February).
I always get the steak at Coral Reef and it has been excellent every time. My FIL had the mahi mahi there last year and said it was the best he ever had.
I too loved the mahi mahi. DH enjoyed the lobster ravioli. And there was some kind of mousse there for dessert, with jack daniels and baileys? which was imo one of the best desserts I have ever eaten - I will go back just for that mousse alone!