The postal service was kind enough to deliver the E-Nano this afternoon! My first impression was wow! This little wonder packs a punch! When I pulled it out of the bag I couldn't believe how small it was. Barely 2" X 3.5". Don't let the size fool you though, this thing is a little giant. The E-Nano blows my old favorite, the PD, out of the water. Using the glass stem, and the heat set @ 6, the hits were cool, plentiful, and flavorful. For anyone who wants to try the PD stems, all you need is a 1" length of 3/8" id silicone tubing slipped over the heat core with about 5/8" protruding above the screen. That said, I think the glass stem works just as well, if not better than the PD stem. The glass stem seems just as efficient, and the vapor is cooler, with an easier draw than the PD stem. Like others have said, this mini monster got me vaked times two to the tenth power! I just stare at it in amazement!