The ladder is generally quite sturdy due to its weight (approximately 15kg). It is a bit difficult to transport. It fits well on surfaces and is stable compared to its height. It opens and closes relatively easily. Its price could be lower.

I bought the ladder two months ago. I have used it several times and I am very satisfied. It is very stable and its folding mechanism allows you to set it at any height you desire. It has not shown any problems. I would recommend it without reservation, with the only downside being its weight. Although it is not prohibitive, it does require strong hands and back...
November 2024: It has developed a significant problem. When you close the ladder, there are two metal "teeth," one on the left and one on the right, which are supposed to be pulled with a metal rod that is located on top. Unfortunately, one of these teeth has almost completely come out, resulting in needing... a hammer to get the tooth back in and manage to close the ladder. It's a shame because it was expensive to purchase (for a Chinese product...), it is not used professionally, and it is almost on the verge of becoming unusable due to the problem it has developed.
In my opinion: you better get the single ladder, which is not telescopic and leans against the wall. It is very stable, has no stability issues, and most importantly, it has no "teeth." That's it!

It is exactly what it says, sturdy and high-quality construction. It did the job perfectly. I recommend it.