I soloed a SSD, it took me about 4 days after work to complete. It's suitably epic looking and great fun to build. I found the top plates to be the hardest part; all the pieces are the same colour and they have to be perfect to work. The UCS Falcon was a much more entertaining and easier build, though it took a LOT longer. I spent a week on it, I ate, slept, worked, and built LEGO. It was easier because it starts with a frame, not a base, so it's sturdier. It was more entertaining as it's an asymmetric ship, down to the detailing. It's also minifig scale, so you can see characters in the cockpit from outside.