Don't know the resort, so I can't speak for quality or availability.
However, Fiji is wonderful. The island is large enough to have two substantial cities plus a lot of plantation areas and wilderness around them. It was run by the British for several generations, so it's comfortable for English speakers. A lot of excellent hotels have rooms with only 3 walls; the fourth is simply a wood screen that rolls down to keep out rain.
Yes, the plane flight is go-nuts long. And you can't see any land for a thousand miles as the plane descends, so it feels like you're going to slide wheels-down into the drink.