I'm in the process of putting together this behemoth...seriously, it's huge. It's not a difficult build, but I noticed some creativity on GW's part. The missile silo is two sided, one side has the missiles and the other has the platform for the lascannon (which pivots and rotates with a full range, I couldn't help but make gun noises while moving it around). I thought it was a rather clever way to put the sprues together.
I'm not looking forward to painting it, as I said this thing is massive.
Based on the size of this kit, I think it it totally possible for Games Workshop to do a plastic Thunderhawk. Sure, it's mostly a joke by now (like Duke Nukem Forever) but you never know. GW is getting way better with their sprues, fitting tons more options in creative ways. Think back to the Space Hulk Terminators. The way everything was positioned, the figures with their rich detail, all in such a way that mold lines were minimized.
Working projects this week: Finish putting together the Fortress, and work on the Ravenwing. I may throw up a Ravenwing tutorial later, as I spent a long time figuring out how to paint them and keep it interesting.