For the purchase cost and their capacity, they are quite worth it and I would give more stars but... I give 3 because it cannot hold enough weight and sags since it is essentially fabric and not hard plastic. Also, you cannot trust its own straps as they are not very high quality, so I had to tie them with elastic cords onto the side luggage rails. Besides, it is something I use rarely and they were very convenient for the few times I needed them. That’s why I chose them due to the low cost.

They fit perfectly on the Monster 125 2023, but not easily. There were no fastening instructions at all in the box, but I personally believe it wouldn't have mattered. How it should go in was probably obvious; it just depends on the bike, as this can be easy or difficult. This difficulty is expected since it is a universal product. Specifically in my case, the fastening clips under the seat did not fit under the seat, while leaving them outside the seat would scratch the plastic. In the end, I ended up making a makeshift solution as shown in the photos. Aside from the fastening adventure, they fit well and seem to be stable. At first glance, the zippers seem a bit weak, but I haven't loaded them yet to have a proper opinion. I will get back to you once I use them enough to comment on their durability.

Update one year later: I am removing one star because after a year there seems to be a significant difference in discoloration from the sun. I am uploading a corresponding image where the normal color (the side that did not face the sun) is shown next to the color it ended up with. The good news is that they have endured quite a bit of wear and tear like suitcases. Even the zippers, which I was worried about, did not break. But their color is no longer black, which significantly detracts from the vehicle's appearance.