I had this twice, once on tap at BruFrou fest and once at the brewery. At the fest my notes said:

"A sour saison, orange in color with a good tart lactic acid nose. Very sour and acidic but I’m also getting some whiskey from it. Unusual. 3.6"

In a much more sober state at the brewery on a beautiful Tuesday afternoon, I wrote:

"An orange-brown with a tart rye and oakey aroma. Tart pineapple and tangerine, oak, whiskey and fairly sweet. A really cool beer. 3.8-3.9"

So I’ll split the difference and give it a 3.8