So far I've purchased 3 of these. I love them! I've purchased many other similar products and brands but this one surpasses them all! I love the multiple "wet or dry" coils. No matter what mood your in, this thing is ready! The batteries last a long time and its a very smooth and clean hit. Unlike other products this one can be broken down and cleaned thoroughly. The best feature of all though is it's looks... it looks just like an e cig or common vaporizer. Once I had to go through a security check point and forgot I had this in my pocket, loaded and ready to go. I had no choice but to set it in the bowl and step through a metal detector. Afterward the officer picked up my "e cig" looked at it, and handed it back to me! I was so happy! Now I go every where and use this in public! No one knows but me ;-) There is one flaw though... I'd give it 5 stars but if you leave this in your pocket it tends to break apart where the battery wires are hidden. I've gone through a few of them now because of this issue but due to the incognito effect this has, I will continue to purchase these and only these!