There aren't enough words in the English language to describe how awesome this story is. Seriously, I love every little bit of it. The voices and characterizations are perfect, the monster plot is deliciously creepy, the crossover is seamless. Maybe the best part is the two brotherly relationships; I really liked the comparison and contrast between them. Also, way too many laugh-out-loud lines to count and a whole lot of hotness. (Not to mention that you kind of made me ship Don/Dean towards the end, which was unexpected but not entirely unwelcome. I was still totally invested in Sam/Dean and Don/Charlie in this particular universe, but I now firmly believe that Don/Dean should occur somewhere and somehow.)