I bought this for my GF, and it was nice while it lasted. We used it for waxes and "crumble" oil, which took longer to get to vape point. The Atmos pen was powerful and gave mind blowing hits. However, we were hitting it a lot, and eventually the plastic cart got so hot, that it melted into the battery. Thus the couldnt get out the cart out. We still have the extra carts that it came with.
So we went to our LHS and bought one of the G Pen micros.We have owned the G Pen a few months now. We have gotten this thing considerably hot, but the plastic (or whatever the cartridge is made out of) can stand the heat pretty well so far. We are also a lot more careful now that the Atmos broke.
I must also say that the G pen micro is better because it has a better design in its cup, which is bigger and allows the oil slide into the pens' coil better IMO. The Atmos cup is 90 degrees vertical also has a cover on the cart which restricts a whole bunch of air flow (but better stealth wise), but I guess you can take it off and not use it. I also think I got a better value by buying the G pen, which was basically 2 pens for $100 + tax, got some glass jars, dabber + "G" keychain, mouth covers, and charger. The Atmos was 70 shipped, with an extra cart and charger.
Just my opinion from using this certain style pen. I also like the cloud pen a lot, which also has a similar design to both of these vape pens.