3 because it has a good price otherwise lower down:
1. it came with 3 screws loose that if I hadn't noticed could have caused injury
2. the rubber has minimal elasticity and you can't do much
3. with 5-10 minutes of exercises the oil in the pistons heats up and smells a bit (it's not that annoying though), but this in winter and with 5 minutes worries me. Also, when it heats up, the resistance of the step decreases and it makes a hissing sound.

as a material, it seems sturdy.

P.S. it doesn't have a resistance adjustment for the step
P.S.2. this is from a person weighing 85kg, it might be made for smaller individuals

Daily use of 10 minutes by a person around 60 kg, the product is quite decent.
It has a maintenance kit with oil and a repair tool for tightening the belts with a small Allen wrench.
If needed, I will return with a new evaluation