You can't really call it good. In 4 months, the zipper broke and it started to tear from the inside because the black fabric on the inside is very thin. I was putting around 10 kilograms in it, using it for electrical installations. It doesn't have organization, and you can't easily find what you need. The good thing is that it's cheap, good for amateur use, and maybe not for everyday use. For example, you can put some tools in it at home and store them somewhere.

Durable, sturdy fabric, reinforced in key areas, plastic waterproof bottom, multiple pockets, strong handles, shoulder strap for convenience.

Very good quality, very durable with hard fabric and a hard bottom. As mentioned below, the bag tends to close towards the zipper, so it doesn't stand up and you can't search inside unless you hold the opening with one hand.
The compartments inside are for pliers, diagonal cutters, etc., the rest fall and screwdrivers don't fit. I have it for second tools for the car, it is very good and worth the money I paid (26€), I would buy it again and I might do it for a wheel bag, because of its hard bottom.

The bag is very good and quite large, no relation to the photos where it appears small. It has many compartments and is ergonomic.

New update 11/19/2020
I would like to add after several months of daily use that the bag does not sit straight like in the photos, but leans towards the side of the outer pocket with the zipper and does not look as nice.

Also, the design does not stay open on its own when closed, but you have to hold it with one hand because both sides close inward.

You don't have to worry about the external pockets because they are made in such a way that they don't fall, as long as they are at the same height as the pocket and slightly higher. But for security, I put low-value items such as clips, gloves, etc.

It looks very durable, it has a lot of space inside with only one zippered compartment, but if you fill it up, you can't find the tools without searching. It has many external pockets, but they are open and you might lose something.

I bought it to put my car tools inside (trunk bag).
Previously, I used different duffel bags which, as you can understand, would bend in the middle as soon as you tried to lift them and the handle was not convenient at all.
Now, although I have smaller capacity, it is more compact and solid, and there is no problem I mentioned before due to the hard bottom and better handle, although I would like the external pocket to be bigger.
The construction seems to be of good quality, the open external pockets are useful, and the hooks that hold the strap are very good.

I bought this tool bag a few years ago (about 4-5...). It is very practical for carrying, as you can wear it on your shoulder and it can withstand any weight you load it with. Also, its many compartments help you keep your tools organized and find them immediately. The only, but significant, issue with it is that due to the way it opens and closes, it tears on the side, below the two ends of the zipper. It is better for someone to get the "round" Stanley bag (FMST1-70749), which opens from the top (like a lid), to avoid such a problem. And I will also get that one as soon as this one tears completely.