We cruise a fair amount – mostly Seabourn and previously Silversea and have heard lots or positive things from fellow cruisers about about SeaDream.
We were on a short four day cruise from Barbados to Barbados. We were looking forward to a nice suite (tick), excellent food (tick) and some pleasant (possibly staid) evenings in a piano bar. We found ourselves on a party ship with at least three groups of families or friends celebrating birthdays and life.
I suspect we were unlucky due to the nature of the voyage but on reading the promotional materials on the ship it does seem that SeaDream is setting out its stall as a ship to enjoy celebrations and as such it is doing a great job for these people. Would highly recommend for this purpose.