I have been using it for a month now. In Rainbow colors, it is truly beautiful. I was afraid it would be tacky, but it was worth it. If it fades, I will update.
Sturdy and high-quality construction. I wouldn't characterize it as particularly large in size as it takes one battery, but much smaller and lighter than those that take two batteries.
It charges fairly quickly (usb type-C). Avoid opening the bottom cover and changing the battery. It's better to charge it with the usb.
Easy to use. When you attach a new coil, it reads it immediately. You can experiment and make manual adjustments if you are knowledgeable.
Otherwise, you can go with auto and it works fine.
You can reduce the screen brightness to save energy, but you won't have a problem with the battery.
If you lock it from the sides, the cigarette won't work.
You can lock it from the buttons and vape normally, but the screen won't work.
Perhaps the only negative thing I found...
I am using a Samsung 21700 (5000 mAh) battery.
With the Geek Vape Zeus Sub Ohm tank.
The mod is worth it!