If you weigh more than 80 kilograms, it is not for you. I was disappointed from the moment I opened the box and saw the metal pieces. Made in China - Made for Chinese people, which means the metal's durability does not inspire any confidence. If you weigh over 90 kilograms, I doubt it will hold up. The construction bends with 80 kilograms. I will put a layer underneath for good and for bad...
The metal is thin and should be thicker with a slightly larger diameter tube. It is a 2 cm tube. Which means it is not sturdy and does not fit in the handle. The diameter should be 2.5-2.8 cm and the metal thickness should be at least 2mm. Also, the packaging includes a basic screwdriver and a basic key for the screws that are useless. You need tools for assembly. A good large screwdriver and wrench or an adjustable wrench. The parallel iron that goes over the door is incorrectly drilled and to complete the construction, you will need to apply enough force to bend the monozugos and pass the screws through the holes that should be angled for easy insertion. Initially, I thought it contained incorrect parts, but with a little more pressure, everything fit into place and was screwed in. Fortunately, because I would have had to return it and I was too lazy to disassemble it. As I said, the metal is lightweight and thin, like a metal chair from the bad eighties. The black paint easily comes off, especially at the points where the screws are tightened. There, the key scratched the metal and the paint came off right away.
In my opinion, this particular monozugos should not be sold for more than 15€, and not because it is worth 15€, but because the value of the metal, handles, and colored packaging could not cost less.
So, whoever wants a good monozugos of this design, it would be better to invest more money in another model. The main criterion is the weight of the box/packaging. If the packaging weighs less than 5 kilograms and is not aluminum or iron, avoid it. With 40€, you can find a similar monozugos that your grandchildren will enjoy.