A child weighing 90 kilograms climbed up and the stairs broke. It's a waste of money, only suitable for light people and not even for amateur work.

I got it at a very good price, but its quality was not so good. It is not as sturdy as others I have bought (more expensive ones). You get what you pay for. The metal on the steps easily "crushed" in various places with minimal use, just a few days after purchase. The black plastic is extremely cheap.
update 7/9/2021
One step broke three weeks ago. The ladder is now useless...
update 20/5/2023
Seeing that my review is helpful, I am coming back to add more.
I had bought three ladders like this because of the good price.
All of them have scratched steps. I warn anyone who wants to use it not to step in the center of the step because the scratch will get bigger, the step will sink more, and the horizontal rod that holds each step will bend more and come out from the sides.
Their metal is very cheap...
Normally, I would throw them away and get more sturdy ones, but I regret the money I spent...

good ladder with wide steps, quite stable, the joints seem a bit weak, not suitable for heavy riders. instructions and everything else are all in Chinese