Perhaps I ate at a different restaurant, but the Quayside Seafood Grill at 3A River Valley Road, Clark Quay offered what I thought was a very good meal at a reasonable (for Singapore) price. We have eaten there three or four times over the last five or six years and always have the crab fried rice with prawns. For two of us they recommend the medium sized serve - and that was certainly sufficient. The fried rice and a Tiger beer made for a very pleasant return visit to Singapore.
I might just note that I had the same dish, the following day, at the Empire Cafe at Raffles, and it did not hold a candle to that at the Quayside Seafood Grill.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.