I'm not a fan of any beer, but this drink is delicious, a perfect balance of flavors.
My suggestion is don't make substitutions. I tried making this with diet coke and I didn't have vodka so I thought whiskey would be ok. It wasn't. But the stout and the Khula were good togeth...
I only did one jigger of vodka because I wanted to remember the rest of my night. I wasn't a fan of the beer in this, it would be a lot better without it.