I went on the Solo Sojourn in July and it was an wonderful experience. The crew was top-notch, never letting you lift a finger to do anything. They were very helpful and one of them even fixed my camera so I didn't miss out on capturing the memories.
Although I was a bit nervous about sharing a room with someone I didn't know, my roommate was great. There were only 19 people on board and everyone seemed to get along just fine. We're already talking about planning our next cruise together!
The rooms are spacious for a boat that small. And there is always a place you can get away and have some 'me' time on the boat.