They offer a lot of room for a given boat length and perhaps for the dollar but at the price of very poor sailing ability and mediocre, or worse, build quality. To me that makes a poor cruiser but I judge boats very strongly by their overall sailing ability. Now then, there was a couple different models of Morgan 28 and a Morgan 30 that were not Out Island series boats. These were pretty good sailors for their era and I would call these pretty good cruising boat if you were not looking for the kind of seaworthiness, speed and ease of handling that more modern boats offer.
Good luck in your search.
Jeff