It is not compatible with all printers!! The paper is indeed hard (resembles craft cardboard) but it cannot be used with any printer as the product description claims

I have used the Navigator 80, 90, 100, 120, 160, 200, 250 grams so far.

The 80 grams is very thin for double-sided printing, it is only suitable for text and never for images. If you write with a pen, it may show through on the other side. With a laser printer, you will have fewer problems, and with ink, if it's only text and the printer has a special black pigment for text, it might work but usually, you will see the ink on the backside, especially if it's dye. Generally, I avoid it even though it is economical.

The 90 grams is the best for simple everyday use or printing plain text. It is still in the thin category but it is sufficient for plain text and maybe double-sided printing, although I still avoid it for such use. I have used it if I need a simple one-sided photocopy and basically use it in place of the 80 grams.

The 100 grams is simply my favorite, it is just thick and thin enough for everything. It is suitable for simple prints as well as a little bit of color if needed, not for photos but for a little bit of color in shapes or graphs, etc. It is definitely good for double-sided printing. It is the sweet spot, as they say. I use it for everyday prints that I want to keep in files and I care about the print quality. It is my favorite and I make sure not to run out of it.

The 120 grams starts to get thick, it is not for regular use. You have it for printing with color and images, it is not a photo paper nor does it have any coating, it just has a better surface and since it is thick, you can print images with slightly more ink. If you want to print work with good quality and binding, it will make it look more professional.

The 160 grams obviously goes to the thick ones, it is like thin cardboard and it is suitable for printing with images or whatever you want comfortably. It is good for covers of simple prints or for works that have images with a lot of color and double-sided printing, and you are afraid it might get too wet. Be careful, many printers that only take paper from below may have a problem with papers from 160 grams and above. I have a photo printer that takes them from the back and I have tried up to 900 grams cardboard and it had no issue.

The 200 and 250 grams are basically cardboards. Cards, covers, printing works for children to color with markers or crafts that they will cut with scissors to stick together, etc. But here your printer may have a problem, if it only has a paper tray from below, then it may not take them or it may crinkle them because it turns them 180 degrees. If your printer takes sheets from the back like a typewriter, it will have less of a problem but you still need to be careful. If your printer is labeled as "photo printer" then it definitely accepts them because there are photo papers much thicker than this.