The boat is amazing. If you don't want to feel cramped in a Hong Kong apartment, and want a fun way to be in the city, it's a home run. I would recommend this for anyone with age appropriate children (It could be dangerous for very young kids) or anyone who keeps a strict schedule.
The boat was perfectly clean and comfortable. The view from the harbor is stunning.
The Sampan system can be incredibly frustrating, especially for anyone who doesn't speak cantonese. It's fine for anyone who knows they'll be on the boat from 23:00-6, but anyone who gets up very early or stays out late will have a hard time with this system. I was there for 2 weeks, and I got stranded on shore, and had to find other accommodations. ooooops! Late night activities will be strictly off limits during your stay.
All in all, a very spacious and fun way to spend time in Hong Kong.