From October 1999 until January 2000 she returned to the Patras—Ancona route as a replacement for MS Superfast III that was undergoing repairs after an onboard fire.

In July 2003 Superfast II was sold to Spirit of Tasmania, with a delivery date set in September of the same year.

On 15 January 2004, the ferry entered service on Spirit of Tasmania's new Sydney to Devonport route.

[8] Corsica Sardinia Ferries took over Spirit of Tasmania III on 5 September 2006 and renamed it Mega Express Four.

[1] Between January and April 2007, it was rebuilt at the Megatechnica shipyard in Perama, Greece with an expanded aft superstructure.