I guess it depends on how you use your boat and who is on it. I had one my first year and no one used it, so I repurposed that room. I take a large family group out about a dozen times every summer season for swimming and tubing. The only time anyone has needed a potty was when a toddler who had outgrown diapers but could not hold it long enough to get back to a spot on shore. I've never had an adult ask about it. But we do take regular swim breaks when the urge strikes. ... I have one person in my group who has a shy bladder and she would refuse to use the facility because everyone would know what she was doing. .. People.