Hi Will,
I hear you there mate. The boxes can be suspiciously large! Here is my Intrepid so far and the box is only marginally bigger than the kit! Ruler for scale, there is no real hiding the size of it. If you do decide to take the plunge and tempt her ire, the decals are not great, pretty much 95% of everything you see on the deck is masked. Its the first time I had ever masked so much deck and it worked out alright - wasn't half as scary as I thought it was going to be. A few other decals needed for the kit are from SSN Modelbau.
Cheers,
Sean