This guide was extremely helpful! I just got my Big Dog assembled, so I took it for its maiden voyage about an hour ago. This video made the assembly and the safety check very easy and hassle-free. I really have to hand it to Himiway: they know what they're doing.
I was impressed to see that the chain comes with a layer of translucent oil that's actually hard to notice with the naked eye. Still, after assembling this bike, you may want to apply some oil to the chain or bring it to a local bike shop for a formal inspection.