Comfortable bag with several compartments...
I have had it for many years and it is incredibly durable...
It has:
A small pocket-like compartment in the front.
A small compartment with a zipper in the front.
A large compartment with double zippers, which has an internal compartment with a zipper and two pocket-like compartments inside.
A small compartment with a zipper in the back..

It has been very convenient for me,
especially the small front pocket.
It also has a zippered pocket on the back. I have had it for 1 year and it is like new.
I would buy it again.

After a year of daily use, it still feels like new. The zippers are very durable, and the strap adjusts perfectly for height. The first open pocket is convenient for small items that you need immediately (e.g. a mask, tissue, lighter). The first zippered pocket comfortably fits a smartphone up to 6.7 inches. The main compartment can hold plenty of things, it has two small pockets for cards and a hidden pocket with a zipper. On the back side, there is another pocket with a zipper, which is quite convenient as well! Small and convenient, it has everything a man needs for everyday commuting!

It is missing one or two points (centimeters) in height, otherwise it is very convenient.

If it had one or two more points in height, it would fit a water bottle or an 8'' tablet (my 8'' tablet with small bezels fits tightly, but overall it doesn't seem like it fits). Now, in order to fit them, for example water, you have to leave the lid outside (closing it with the two zippers on the sides).

The materials seem to be of good quality. There is cushioning between the compartments that helps it maintain its shape even when empty, while the items inside do not alter its shape. It also has comfortable zippers that do not get stuck (the top one is double, the others are single).

It has 3 compartments with zippers, and one pocket compartment in the front (where you can put your phone for easy access, but it will protrude outwards).

I would prefer the front pocket (petal-shaped) to have the zipper not unnecessarily reaching downwards, because if you forget it open, it won't provide the same protection as if it were higher and smaller. On the other hand, it opens better for searching small items. It can fit a phone and a wallet together, but it will bulge a bit and feel tight.

The middle compartment that opens from the top is the largest, although not very thick, but it will serve its purpose. It has two slots/pockets and one with a zipper for small items such as ID, cards, and a lighter.

The back compartment/space on the back is narrow and the zipper is lower than the maximum height. It is suitable for small items (papers, cards), maybe a wallet, but it will bulge and it may fit a phone and be secured with the zipper, but it shouldn't be too big (most 5'' phones won't fit, impossible for 5.5'') because the phone will protrude. My 4.7'' phone (Redmi 2) barely fits, while Xiaomi Redmi Note 4x doesn't fit at all (it has 1-2cm extra space on top), so you have to put the phone elsewhere (maybe with the wallet in the front).

Overall, as a small bag, it can fit glasses with a case, wallet, phone, keys (and cigarettes for smokers), and a few more things (tissues, etc.).

The non-adjustable strap (sewn onto the body) is sufficient for crossbody hanging and has the right thickness and width for the size of the bag.

Dimensions: 19x16x5cm Volume: 2lt
It's a shame about the "missing point" in many areas, otherwise it would receive 5 stars.