So I tried to practice my home and thought about the mini stepper that really does not take place.
This mini stepper is twice as expensive compared to those I have seen in stores (Decathlon, Go Sport), but I trusted the comments.
I do not regret my purchase, it is very solid. I was afraid he does not do enough work glutes; but this was not the case. It is obviously softer than the real stepper to be found at the gym, but for someone like me small size (1.60m) it is very satisfying.
I use it almost every day, sometimes in the morning and evening. If it takes 1 year to this rate I will not complain.