Have a look at this video!
I haven't been on a SeaDream cruise since May 2013, but I'm hoping to be back sometime... if they ever get SeaDream I up and running again after a recent engine fire. Before we do another SeaDream cruise, though, I think we will try barging, either with European Waterways or French Country Waterways.
One thing I notice in this video is that they say SeaDream costs 15,000 GBP. I have not found that to be true, except for when they go to places like the Amazon or Norway. If it cost that much, there's no way Bill and I could have done it three times. The cruises are expensive, though, and for us, require a lot of planning.
I do miss SeaDream. I have to admit it's been too long since we were last onboard. And I have yet to try the identical SeaDream II and its legendary staff. I guess Bill and I better stay in Europe awhile.