Pretty interesting stuff.
To be honest if the ship alone was being sold for £8-9 just as a model for collecting/sticking on a shelf I'd be tempted, there are a lot of action figures, statues and collectables from far less well known properties that cost more than this expansion.
Add on a few quid for the extra bits and pieces for the game, and to an extent just the fact it has a game for it and I would say the price isn't too bad at all.
I'm very interested to see a review of the Millenium Falcon or Slave-1 now to see why they have a much larger price tag compared to the standard Imperial and Rebel fighters.