Call critics mean and over-sensitive but Bioshock Infinite:Burial At Sea has not been getting good reviews mainly due to it being two hours or less. Now that's pretty short for a fifteen dollar piece of DLC and while it has gotten positive reception for making a pleasant return to Rapture from critics like Rev3Games and GameInformer, it's a pricey one at best and you will be wanting more.
Overall only get this game if you really want to relive Bioshock again.
Bioshock Infinite:Burial At Sea:Episode One is rated M.