Well I haven't been, but my uncle and auntie have...and they asked for their money back!
(but then again, they are pretty uncultured).
I've read many of Dickens books and kinda like the idea of a themed educational museum - Dickens creates mysteriously dark and bleak atmospheres in his book that could translate well to an interactive set. I'm not really sure how a 'boat ride' would exactly fit in with that though, and to be honest, it just all sounds a bit tacky.
Dickens as a person was supposedly a rather nasty piece of work. His life story is certainly interesting and worth looking up. Apparently, he had a rather unhealthy interest in younger women, abandoned his wife (forcing her to get the equivalent of a divorce, which in those days basically meant being shunned by society, and no longer allowed to see her children), and was consumed by his work. He was a celebrity within his own lifetime, touring the country reading aloud from his Christmas stories. My mum's great aunt (or something) used to work for him as a cleaner and used to say he was quite horrible, despite his goody, goody stories.
No idea if the attraction conveys all this, but I have a sneaking suspicion that it doesn't, and is just feeding off the local Dickens tourism of Rochester. If you really want to learn about Dickens, then I suggest doing a local tour or going to see the local landmarks yourself. There are many shops and churches mentioned in his novels in the local area and across Kent. Rochester also has a Dickens Festival in June and a Dickens Christmas Festival in December where people wear period dress and sell mulled wine and all that ****. It's very touristy but I quite enjoy it all