We have a family of 5 and have done all three size suites on the Magic & Wonder. If they are worth it is a tough question because everyones financial/value perspective is different. They are very expensive, but worth it to me.
We are a family of three and have stayed in the Roy/Walt Suite and the 1 bedroom suites as well. My husband prefers the Roy/Walt suites simply because it is his "home away from home". My husband and I have our own seperate area and my son can have the privacy if he wants it. We also love the Concierge perks that are offered. I agree, the suites are vey expensive and everybody has their own opinion of what "value" they will receive for their money. My family does spend time together in the room or on the verandah playing games, watching DVD's from the Library or ordering A dessert buffet from Palo when staying in the Roy/Walt suites. We also have had parties there as well.
My husband and I are booked on the Fantasy in September 2012 in one of the "R" Suites and are looking forward to seeing what this ship has to offer.
This will be the first vacation that we have taken without our grown up 20 year old son so we are hoping to spend some quality time together at last