Not a review but certainly my opinions on the AIO. It's a very simple and easy to use device that is 19mm in diameter and 118mm in height with a 1500 mah built in battery. The tank has a 2 ml capacity and is obviously built into the device,hence the name because it really is all in one. It can be purchased in 3 x two tone colour configurations of black/white,red/white and black/ grey or 2 x solid colours of black or stainless steel. I anticipated the tank to be exactly the same as the cubis but it appears to have one difference which I will mention a bit later. It does however take the cubis coils which offer a fair amount of choice. It has the standard safety features but it's not adjustable therefore you vape will supposedly diminish as the battery drains although I will say I did not notice any difference apart from when initially charged the top of the tank was a bit warm but that disappeared after approximately 45 minutes of use. That was the point I wanted to make earlier in regard to the difference between the cubis tank because I certainly did not have that problem with the cubis. I have a black cubis tank and therefore opted for the silver AIO because the max fill line is very hard to see with the black version but obvious with the stainless steel version. I have also read that some people are experiencing problems with the juice leaking upon insertion of the top of the tank/ coil etc but I have not had any problems in that regard. My suggestion would be to ensure you don't fill it above the maximum fill line. It comes supplied in a typical Joyetech box with the device in a cut out foam block. Also included are 2 x 0.6 ohm coils, a spare drip tip and a usb cable. A warranty card, warning card about ensuring your coil is saturated before use and a basic but informative quick start up guide are beneath the foam block. It is a simple 5 click on and off system and that's it as it's obviously designed to have no user adjustment including varying power. The only adjustment you can make is to have a colored light shown inside the tank when in use, which Joyetech describe as an indicator light. This is a fair description as it allows you to monitor your battery charge and juice level by the frequency of the flashes. The colours available are red,yellow,green,blue,indigo,white and purple or if so desired just set it so no colour is used which I would presume gives a longer battery life. I have not been using it for that reason but have used it when I suspected my battery would be getting low and could imagine it being useful in the dark to check your juice level. In regard to battery life I estimate I've been getting approximately 8-9 hours out of one charge using the supplied 0.6 ohm coil. The airflow can be adjusted by using the top cap of the tank. It rotates a full 360 degrees going from fully open when the 2 dots are aligned to as tight as possible at the next quarter turn and back again on the next quarter turn and so on. To put it into an easier to understand format imagine a clock; 6 o'clock ( when the dots are aligned) = fully open 9 o'clock = as tight as available 12 o'clock = fully open 3 o'clock = as tight as available In between these settings the draw either increases or decreases but in my experience apart from fully open or fully restricted I don't notice much difference. Not saying that's a bad thing because I find it a satisfying vape. One feature that I do like is the child safe locking mechanism on the tank which operates on the same principle as a pill bottle where you have to push down and twist to open it up. A safety feature like this has to be a good thing for everyone concerned as long as it doesn't break and render the device inoperable. As the tank is not removable cleaning it is a little different but all I have been doing is wiping it out with a damp bit of kitchen roll whilst cleaning the top in my normal way. Another possible con is the obvious one in that if you happen to drop it and the glass cracks the whole thing is cactus but it is what it is. One last complaint with it is that it's a PITA to charge because the charge port is a tad over half way up the device meaning that if you try and charge it upright it has a tendency to want to topple over unless it's supported somehow. Of course you can simply lay it down but I tried to avoid that particularly if there's juice in the tank. I do however have a concern which may be unwarranted but I'm going to mention it. The device is not a TC device but you can buy cubis coils in both nickel and titanium and my thoughts are could this create a dangerous situation. I'm assuming the device will have some form of safety built into it to eliminate any potential problems but I for one will not be trying to find out! All in all for $30 Aussie you can't go wrong as a newbie or seasoned vaper and apart from the tank getting a bit warm initially and my coil question I would recommend it. Just a picture showing the light working. And a size comparison for those interested from left to right. 1/ Istick 30w with a cubis tank 2/ Joyetech AIO 3/Joyetech Ego one with tank ( not the mega or mini) 4/ An old ego with an Aspire bvc clearo. I've attempted to describe everything as I have found it and hope is of some use to anybody thinking of spending money on it. P.S. Please be gentle with my efforts as I never thought I'd ever do anything like this but wanted to try and this seemed like the perfect device because there's not much to understand!