I finished construction of my space station. I nearly gave up on it because it had gotten so big that I started to suffer major FPS issues when I got close to it, and the final construction flights were like a slideshow. But it's finally done and I can move on to other things.
What kind of rig are you running? thats one thing i fear. I dont want to buy this game only to find the epic shit i wanna build will kill my mac. I'm running an iMac--3.6GHz/i3/4gb/ATI-HD4670. The demo runs great.