If you have some tools and are handy, you can easily assemble it.
Now if you are inexperienced, it's better not to buy it.
Just so you know, it requires quite a bit of thought because you can't make sense of the assembly instructions.

It seems sturdy, but I haven't installed it yet. The problem is that it doesn't have regular hinges. It has some weird silly things, and to open it you need to have 1-2cm of 'space' above. I don't know how long these will last. It will probably be drilled for regular hinges.

very difficult assembly
I made a mistake with one corner and it wouldn't come out no matter what, and with a little effort the corner broke...
the magnets are not very strong and the plastic hinges I don't think will last over time
if someone is considering choosing it for the price, they should not do it on surfaces that are not perfectly flat (like a concrete wall)
it is good for wooden or metal surfaces

difficult to install (aluminum friend and it took quite a while to install the doors. decent and durable for a year now otherwise.

It is not the most sturdy construction. For light use, however, on a secondary door, it is fine! Assembly requires simple logic, it is not difficult but not the easiest thing either. I didn't understand where the magnets go. Keep in mind that it also needs a frame.

Cons:
- Difficult to read instructions.
- Could have more information on how to take measurements and properly secure the screen in construction, for example.
- The plastic hinges seem very fragile for intensive use as an exterior door.

Pros:
- The price, it can get the job done despite everything and therefore has a good quality-price ratio

Good for the 42 euros I paid for it! It needs a little work to be assembled! Opens and closes just fine! Time will tell!

Very good for the money. If you hold them in your hands, measure correctly, and cut straight with the right saw for aluminum, you won't have any complaints.

Excellent screen and definitely value for money. Some mention the difficulty of assembly with the instructions. I didn't bother much with the instructions, just wanted to see the final image of how the metal goes. I didn't have any difficulty, it just requires a little imagination. The screen consists of 4 vertical and the upper horizontal one, which are similar, 1 middle one slightly wider, and the bottom one even wider, and they are connected with some plastic pieces that fit with difficulty. The supports on the wall are screwed onto the frame of an aluminum door with a drill and on the screen. It is good to have an angle grinder because the metals are quite thick and it will take time with a saw.

My rating focuses mainly on the included installation instructions, which are unacceptable. Anyone expecting to find explanatory and detailed assembly instructions like IKEA/JUSK should look elsewhere.

The quality for the money it costs (~49€) is indeed satisfactory, but the inconvenience that someone will encounter due to the lack of instructions in its placement is equally a deterrent for its purchase.