We did the 3-day Wonder last October and LOVED IT!!! We had stayed at WDW 5 nights prior to sailing and were trying the cruise to see if we like cruising - - - the answer was a resounding ---YESSSSS!!!!! When when returned to the port after the 3 nights we wondered where the time went!! It was way too short!! There are so many things to do!!
We have now just booked our first 7-night on the Magic for Jan. 2003!!! It's a long way off, but I'm sure when it gets here and when it's over, we'll think it was too short too!!
Have a great time whatever you decide!!