No love for Jester King I see. Tart of Darkness was the first dark sour I had and was a great beer. Look forward to trying Funk Metal out sooner than later. The feedback seems to be positive thus far.
There is an entire thread dedicated to all things Jester King. There is a ton of love for Jester King. If you are looking for more information on Funk Metal or any other JK beer. http://beeradvocate.com/community/threads/everything-jester-king.35800/
If you can't find this... just find some Ranger Creek Small Batch #4. Basically the same thing with a little smokier of an aftertaste.