Mass Effect 2 - Overlord DLC Review @ Eurogamer

Eurogamer has a positive review of this DLC scoring it 8/10, thus making this DLC for Mass Effect 2 the high score so far. Here's a little bit of the review, taken from the beginning:

Overlord, the latest and largest of the Mass Effect DLC packs, is a mixed bag in the best possible way. It's a medium-sized adventure that never lets one gameplay element dominate for too long, leavening the expected duck-and-cover combat with openworld exploration and a dash of environmental puzzling, all wrapped up in a story that builds to a satisfying and pathos-heavy finale. It is almost exactly what you want from a low-priced downloadable add-on.

There's also reviews at thegamefanatics, gamecritics, gamesugar,  BAD ORC, and Explicit Gamer - all positive as well.