Wrinkle free, well I would not say that.  However, very little ironing is needed for them to look good, and they do iron very easily and quickly compared to other shirts that definitely need/require ironing.  I would recommend them for people who travel a lot, and may not have access to an iron, but don't expect them to look perfect, or people who can get away with wearing business casual clothes.  I usually wash and then put them directly into the dryer with a lot of other clothes, so I don't know how they would do just hanging them up to dry.