I do not cease to rejoice at the purchase, a very good deal!
I took the device for repair, which I did on my own for the first time. Very quickly allows you to markup and work on it immediately. It is especially convenient to work with ceramic tiles. I tried without it at first - I screwed up a whole row.
Its pros:
Cheap, lightweight, easy to handle.
Cons:
The tripod is not massive enough, you have to handle it carefully in repair conditions, which is not always possible.