question regarding domain mapping

Just realized there is this Domain mapping plugin: https://premium.wpmudev.org/project/domain-mapping and two others from wordpress.org available http://wordpress.org/extend/plugins/domain-mapping-plus/ and http://wordpress.org/extend/plugins/wordpress-mu-domain-mapping/.

Might even be a 3rd one I don't know about.

Which one are you using and does anyone know what the main differences are? Which one is recommended?