We also visited Barramundi with a voucher so we definitely weren't expecting the world, but the seafood platter was more of a fish & chip platter that you could buy for $10 at a local fish & chip shop. You would be quite dissapointed if you paid full price for the seafood platter.
The staff tried their best to be polite & attentive but it was a comedy of errors, we orderd a white wine but they poured us a red.
Maybe it's best to keep in mind that it is a "cafe/bar" & not a restaraunt. A strong point is that a lot of the meals are reasonably priced & the beer & wine selection is quite good.