"Although Wrath of the Lich King is feature-rich, most of it is aimed at high-level characters. The Death Knight character class, for example, is only available to players with characters at level 55 or above. The new content on Northrend is aimed at level 68 and higher, and the overall level cap has been raised from 70 to 80. This makes Wrath of the Lich King a must-have for long-time World of Warcraft players, but is non-essential for those just starting their journeys in Azeroth.
Those with the appropriate level of experience, however, are in for more of the same great gameplay that has made World of Warcraft such a huge success. The new Death Knight class is well-conceived and fun to play, and the villainous spin on the Death Knight character will likely appeal to older players who've tired of the standard do-gooder heroic mentality. The new playable areas are exciting to explore and terrific-looking. Other features, such as a system for tracking player achievements and a new Inscription profession, only enhance an already value-packed expansion. "