My first tasting of this beer, I hated it. On my second tasting, I really see the merit in this beer. It is pleasantly sour. Despite some of the descriptions above, its a great beer. There is some residual sweetness and an overall powerful flavor that does not lend it to a session beer. I'd be interested to see what some bottles with some age on them taste like.
EDIT: ~ 4 months later.
I bought a 4 pack of this beer at the end of October. I drank two and put two in the back of the cupboard. In October, this beer was very acetic. It had an overwhelming flavor that I described as not being a good session beer. 4 months later, the acetic character has really faded. It now has a much more rounded sourness from a good bit more lactic acid. IMO, a much more enjoyable beer. Unfortunately, I don't have any more bottles. Now I'd be interested on getting 1 and 2 years on a few bottles. I'm guessing it will start turning to an intense lactic tartness after some time.