Staying on Big Ruby was an awesome treat! I spent 7 days on her and would love to go back...markus was awesome at check in, and the boat was cozy and fun. While in summer the afternoons can be hot the boat cooled off in the evenings lending itself to many nice nights on deck under the stars! The marina is also located very conveniently in between downtown and freemont easily allowing you to have the best of both worlds and several bus routes within walking distance to move throughout the city.
I have stayed in quite a few places in Seattle, and this one was definitely awesome!