Very convenient case for organizing the trunk space. However, it is better to avoid heavy items (e.g. a fire extinguisher), as not only can the Velcro detach, but it can also tear. For a first-aid kit, supermarket bags, car washing accessories, etc., small items, it is excellent. Also, on a trip with suitcases in the back, etc., I did not need to remove it, which was convenient, but that probably depends on the situation.

Very useful, it just lacks one or two practical velcro fasteners on the pockets to be 90% successful in terms of practicality.
In terms of quality, it held up with use and weight for about a year before the stitching started coming undone at the stress/hanging points, without having broken yet.
I use it on the back of the rear seats, with access from the trunk, for quickly retrievable items.

Positives:
1. Practical! I finally found space in my trunk
2. Much more convenient and stable compared to similar items that attach with Velcro or a clasp (which you make by drilling into the back of the rear seats). I had tried both but they were useless, they wouldn't hold and kept falling down).
Negatives:
1. It's not for very heavy weight because it will obviously tear (I did manage to fit the small fire extinguisher though)
2. The handles that you hang it from the rear window are a bit visible (at least in my car), but it's not that significant.
In conclusion:
I recommend it and I will actually get a second one for the other car

Nice but be careful what you put on it because I put a car jack and a couple of other heavy items and the seams at the top where it hangs got torn. Otherwise, it organizes things inside the trunk very well.