Even with Plantation 3 star (a more exciting lightly aged rum than, for example, Bacardi) it's...rum and orange juice. Yeah, there's not much more to add other than this is indeed rum, orange juice, and a bit of red fruit.
Tried it exactly as written and it was nice, fruity without being sour (you can't really detect the lemon juice at all). Rum plus fruit juice without going a tropical direction. I suspect it would indeed be even better with half gold rum.