I just talked to one of the employees at my lhbs about this yesterday. He used it recently. He said it's a little smokier than he likes, but not undrinkable. He said if he were to use it again, he'd back it off a little bit. I think he used 1.5 lbs. A little smoke goes a long way.
I personally haven't used it. The main reason, is because I've never tasted a smoked beer that I liked. But, that is just personal preference. They all seemed to be too heavy on the smoke for me. When I taste my friends, I'll let you know what I think of it.