Awesome, the sound stage sets felt positively huge in Prometheus. I just felt that they were a little empty-looking inside the derelict ship, itself. I imagine they were much larger than Alien's derelict, but I much prefer them using tricks (kids in space suits) and cool lighting (with Ridley wafting purfume around with cardboard sheets) and darkness to achieve something otherwordly and spooky. I liked Prometheus enough, but I'd rather have the ship and temple not be empty with only holograms to fill up the space.
Sidenote: I didn't really like the holograms or the ghosts. The Orrery wasn't terrible, but the ghost Engineers were too grainy.