Unfortunately, I received it with 20 wooden blocks and not 25 (I have the 18L), so now that I needed the press for the fermented grapes, I was just left disappointed.
And the strange thing is that only the 6L press has 20 wooden blocks, even the 12L has 25, so I can't understand how such a mistake happened.
I have sent an email to the store, but I will be forced to ask a carpenter to make some for temporary use.

For now, 1 star.
The review will change depending on the store's response, or when I manage to use it.

Update
The carpenter made us replica wooden blocks so I could use it, but as another user said, the rotary screw reaches the edge of the bucket with the iron we turn, and indeed with the specific blocks included in the package, you can't do anything unless you have 15-20L of grapes. I had to cut some myself as best as I could (see the picture) and got the job done. Of course, I didn't have many grapes, so I was still turning the rotary screw by hand, but luckily I am strong and managed to get a lot of wine out, which would have gone to waste if I hadn't made this makeshift solution.

And let me inform you, even though it says to clean the equipment, guys, do a VERY thorough cleaning.
Even after half an hour with a sponge, wire, etc., every time I turned the rotary screw for testing, more residue would come out due to friction.
After use, clean all the equipment well and apply some kind of oil. I temporarily used a little olive oil, just a few ml on the iron, then put them on a paper towel to remove the excess, and finally wiped them with the same paper in case the oil hadn't reached everywhere. I forgot this the first time and it rusted completely in one day.
The nylon bag does a very good job of keeping the grapes inside and preventing them from coming out here and there.

So I am changing the rating to 4 stars. Normally, it would deserve 3, but since the quality of the items is sturdy, I'll stick with 4.

I ordered and purchased the grape press from a physical store, at a slightly higher price. It is carefully packaged. You have to assemble it yourself. It's not difficult. The instructions included are informative, both for assembly and for proper use and storage. However, please note that they are written only in English. But it also has helpful images. For a Chinese product, it seems quite good. The wood (probably oak, I'm not sure) is untreated, the base is sturdy and heavy (probably made of cast iron), and the central rotating axis (I'm not sure if I'm saying it correctly) is sturdy and heavy. It includes a bag with small holes to filter the must better. However, a filtering bag is necessary because the gaps between the wood are not small enough to prevent the grape skins from passing through. I will try it in about a month to tell you about the results of its use. For now, the review only concerns the appearance of the product, in case you want to buy it, to have an idea from the image. I haven't washed it yet, I will do it when the days of use approach, with mild soap and water only. I don't know if the wood will take on color from the grapes yet, but that doesn't matter to me, as long as it is functional and doesn't break. I hope it will be efficient for the amateur use I want it for and finally make my life easier.

22/11/2021
After the initial comments from the first impression, and after using it 8 times now, I deduct one star. I should note that I use it to make grape must, not wine. Let's go through it: 1) The bag filters the must quite well, and then it doesn't need much straining during boiling (this surprised me pleasantly because the holes in the bag seem quite large, yet it does a very good job). 2) I manage to extract the must much faster than when I used kitchen utensils. 3) The cast iron base is quite sturdy (at least it lasted for me). Now, the negatives: 1) The pressure applied with the lever must be done slowly, meaning you should wait for it to release most of its juice and then continue pressing, otherwise it will start spitting grape skins from the holes of the bag, making a mess. I made a mess the first two times like this, then I realized what was causing it. 2) Due to it being manual, you won't be able to extract 100% of the must from the grapes, there will be a percentage left, no matter how much you press. With the system using a chestnut, you may be able to extract a higher percentage due to the greater force that can be applied to the grapes. However, don't overdo it when you see it starting to strain, I don't know how much the wood can handle. 3) The cast iron, as well as the iron components that make up the central axis and the lever system, lose their external coating-varnish in some areas after the first use, especially the iron components, and more so in the areas where pressure is applied. 4) When most of the must has been extracted from the press, it requires quite a bit of pressure to start getting more quantity. I, as a woman with enough strength, struggled with it. It will probably be easier for men. 5) The tool is good to be placed in a location where you don't fear scratching its surface from the cast iron base, as when you turn the lever, the base also turns when pressure is applied. I ended up damaging my wooden kitchen table a bit this way. One tip, I placed marble underneath and I can say it did a good job.
6) The wood of the tool seems a bit fragile, in some areas, those used to press the lever, they developed some cracks. I hope the situation doesn't worsen.
7) The semi-circular woods that go right above the bag could be more fitting, so that the grapes are not squeezed and come out from the side that is not covered by wood. As you press the must downwards while turning the lever, the uncovered surface is not pressed, resulting in the bag coming out on top and then making it difficult to remove the semi-circular woods, as well as preventing better pressure on the grapes. I don't know if you understand what I'm describing with what I'm saying. You need to find the best way to apply the woods in order to limit the problem. I found one, but I can't describe it.
8) The bag could have a smaller notch, so that the grapes don't come out from the bottom when you put the first dose inside. You need to make sure to apply the notch well. Anyway, every time I put the first dose of crushed grapes inside, it released a few stems. Again, I don't know if you understood what I'm saying, if you see it you will understand. I hope I didn't forget to mention anything. Know that you will definitely need other woods to supplement and apply more pressure, I used the legs from pallets, they did a good job. Make sure, however, that whatever woods you use, they have the same height, in order to apply uniform pressure and prevent the woods from struggling. Also, wash the press and the components quickly after use and let them dry well. If the stems dry on top, it will be difficult to clean it later. After washing, I didn't apply anything to them. Maybe I will lubricate the iron components with a little oil to prevent rust. I'll see. For me, it gave me moderate impressions in the first year. Maybe for the price, it's a good tool, for amateur use only. However, I think it could have some better features in terms of product details.

23/8/2023
If your hands get tired and you have the necessary tools, you can make a special simple construction and replace the lever with a hydraulic bottle jack for much easier pressing of the must, so your hands won't get tired. With a quick search on Google images for DIY grape press, you will find examples. That's how I will do the job this year.