For just about as long as I can remember, I wanted to take a Windjammer cruise, which was odd because I really don't care for cruises in general. I think the thing that I dislike about cruises - that they are on these big, impersonal boats - was what I liked about the Windjammer.
You are on smaller, more interesting boats, you get to have a more personal experience with whatever country (or countries) you are in, it just makes for more of an adventure. And now that I put it that way, I guess really can't argue with it. So if you're after adventure, you may want to go Windjammer. But if you're interested in a cruise with Windjammer, you might want to stay away.