Mass Effect 3 - Leviathan DLC Review @ Gamespot

Gamespot has penned a review 6/10 for this game

A quote about how this DLC compares to ME2's DLCs:

Compared to Mass Effect 2's finest add-ons, which matched emotional storytelling with exciting gameplay, Mass Effect 3: Leviathan comes up short. That oceanic reverie is singular but brief, the gameplay already having drawn to a close before you reach the story's climax. The bulk of the adventure occurs in a laboratory on the Citadel, where a scientist has discovered signs of a creature or being so powerful as to be a potential reaper-killer. Thus begins your career as detective Shepard, walking around the lab and clicking on things until you're allowed to continue.