http://www.eurogamer.net/articles/2012-06-27-the-elder-scrolls-5-skyrim-dawnguard-review
I thought it deserved a 9 out of 10, I tend not to trust eurogamer after they gave Shivering isles a 7 out of 10, and MGS4 a 8 out of 10...
Yeah. It wasn't a terrible DLC to be quite honest. The fact that it took me seven hours to beat compared to the two it took to earn $20 made it a good deal alone. I mean, I do miss expansions because they were far, far longer than the things we're getting today, but just considering... Anyways, my only complain is that the story for the vampires could have ended in a less abrupt manner(no spoilers here), but as for the Dawnguard I am not sure. Their armor is cool though.