I have it for 2 days and I have used it minimally. It heats up relatively quickly and its handle is very convenient and practical, and very lightweight. The only thing I would like is for the battery to last longer. It provides 30 to 40 minutes of operation and requires 3 hours of full charging. Its battery is the 18650 1.5amh 3.6V and it should have been at least 3.5 amh to last 1.30 hours. There is a video on YouTube where you can open it and change its battery, it's easy. Also, personally, I find the 7mm tip convenient because it heats up faster than the classic 11mm one and the glue comes out more fluid for more detailed work. Other than that, I am very satisfied with my purchase.

***23/03/2021
After several uses, the battery lasts about 30 minutes and charges in 3 hours. I have no complaints, it's great, it's convenient for work if you want to go somewhere and repair or insulate an element on the circuit board or stick a frame at home, etc... without having to pull a cable or extension cord.
I will give an example of a malfunction that occurred to me on an electric sliding door that you enter with a code, the door was sticking. It turned out to be the capacitor, and I insulated some exposed elements on the circuit board with the gluepen (poor factory construction) and I didn't like how it looked. Half an hour is enough and more than enough for the battery. Imagine having to pull an extension cord for a gun with a cable, how annoying it is.