The Nebula-class used many of the same components as the Galaxy-class but they were arranged in a completely different way. The ship made its debut in the debris field in 'The Best of Both Worlds', but only the most eagle-eyed of viewers would have seen it. It made its full debut in 'The Wounded', when the design was used for Captain Maxwell's ship.
The starship comes in a special box that you can proudly display at home or in the office.