I tried this at the Kush Expo in LA a couple of months back. I feel like searching for the perfect device for PG has become somewhat of a Holy Grail quest for me. I've tried the CE4 carto, Bud atty, 2.4 D9 cart at 3.7v, 7.4v Herc, and the Dart. So far, I've had the best results with the Dart. I have high hopes for the Cera EO core (patiently waiting) and the 1701 from D9. Anyway, back on topic- although my spidey sense was telling me that this was going to be just another e-cig turned vape pen, I felt compelled to give it a shot because it was being offered by TetraLabs. I love the idea of having carts/tanks pre-filled with PG that I can just pop in whenever I want. Sadly, this feature wasn't enough to save this pen. The 2 things that I found: The taste is HORRIBLE; very burnt flavor. I did not get medicated whatsoever. Granted, I have a relatively high tolerance, but c'mon... IIRC, d-limonene can have a bad reaction with plastic? All in all, I would steer folks away from this.