When I brewed the Churchill's Nut Brown Ale a few months ago, I used some PB Brewer's Extract that my wife had picked up and added 5 ml of it to a few 1/2 liter bottles. This is a picture of one of them that fermented for 21 days, conditioned for about 35, and chilled for a few weeks. Came out really good; a nice dessert or sipping beer. I can't say I would've thought to try this had my wife not picked up the PB extract, but if you're a fan of PB or a darker ale/stout with a nut flavor to it, I'd say give this one a try. The PB flavor is pretty subtle; comes across more like hazelnut to me. Appearance wise, it was really nice -- dark, dark brown with a nice 1/2 inch tan head. Head dissipates a bit throughout but is always there, and this left a fair amount of lacing along the glass.