it's been a month since I bought Davinci Mini. I'm not satisfied with the device. It doesn't burn so well. it says that the max temperature should be 200 Celsius (4 light mode) but I see that it doesn't burn enough. I have another vaporizer with a screen where it shows you an actual temperature and I can see that substance looks different, it is not so dry and still has a green color after Davinci Mini, and it is more dry and gray color after smoking it in the bigger vaporizer. Also, almost no smoke comes out when exhale. It is kind of difficult to inhale the smoke, feels like the tube is small and air does not go well thru it. Batteries are very short time. I bought two and both of them are enough for 4 sessions. And it is getting hot-hot while using, sometimes not comfortable to keep in the hand. The color (I've got a red one) is amazing thou.