I had the ESBam a week or so ago talk about big citrus and bitter on top of tartness,im not a big fan of sours but most of their beer i can drink without dumping, i could imagine the sour beer.The oro de calabaza wasnt too bad.Although i dont like to drink a whole bomber of it at a time. I think it was the noel de clabaza that i liked,it was pretty complex with a little more sour than the others it seemed.