The important thing is that the flame tends to not be purely blue in color, but part of it has areas where it tends towards yellow-red. Which means that it does not burn the gas properly. In other words, it emits carbon monoxide, which is very harmful to our health, even to the point of poisoning. So it's better to avoid such a device.

The flame it produces is very low, it delays cooking too much, it is good for crepes. Prefer another one with a little more money.

The air hole is not adjustable so that at the maximum position the gas comes out unburned and the utensils blacken. Only in the minimum position does a blue flame come out, but it is only suitable for coffee... useless... After loading it, I will try to enlarge the hole to see if I can solve the problem because otherwise it is going to be thrown away, because it is a large device for just coffee, a small gas stove does its job better.

Its purpose is cooking.
Whether it will withstand the hardships...
I don't know.
For its price, it has done its job.

It is a good device, but the flame it produces is too low for cooking. I only use it for emergencies.