Grandeur is not going to be as high a quality level of ship as Magic/Wonder, but that said, it should be a pleasant and enjoyable vacation.
We have done 5 RCI cruises, 4 since 1/2006 with another in 3 1/2 weeks, and 5 DCL cruises since 2002, most recently May 27-30, 2007, or about 6 weeks...