I have to second the MBV Cinnamon Roll. I too got it with some extra flavor shots. It is not supposed to hurt plastic tanks. It has a light buttery flavor to me on exhale, with a hint of cinnamon on the inhale. Its very good.
I just got the sticky bun today. It's wonderful. It's like it's warm. Right outta the oven.Another MBV cinnamon roll fan here. I order the juice and now a bottle of the flavor concentrate so I can up my shots on a whim if I want. I added a drop or 3 of cotton candy flavoring this last time to up the sweet a bit and it works. Have also read that adding cheesecake makes it a cinnamon roll with cream cheese frosting
I hear good things about MBV's sticky bun but haven't tried it yet (it's on "the list").