I recently had a glass of the Toronado 20th which is a reasonably similar beer, and I don't think it did well with age at all. I would suspect, however, that Vinnie will tell you this should age well. I know of people holding on to their bottles, but I will be drinking mine.
I paid 25 for my bottle. If I could get 20 dollar bottles, I would probably buy 4 or 5. It is one of the best sours ever.