It has plenty of space to fit large items such as 12-inch tablets/laptops and a folding umbrella, BUT it has 2-3 small compartments scattered on top of it.

It is common practice to have 2 zipper guides on a zipper for large openings, which it does not have.

The front top pocket, although it appears small for quick access, goes all the way down to the bottom of the bag. Overall, it has 4 large compartments with varying volumes and 1 small front quick access pocket.

Its strap is sewn onto the bag and does not come out/change unless you modify it (I found all the necessary items for modification on Scroutz at low prices, where it seems worth it to alter it slightly to make the strap slightly better).

It can fit A4-sized documents without folding.

Its shape is ideal for long, narrow objects. Small items (mobile phone, wireless earphone case, etc.) will need to be searched for inside, while, as mentioned before, it only has 2-3 small ones inside.

It is large if someone wants to have only the essentials for everyday use, such as a mobile phone, wallet, passport, any folded document, glasses case, Bluetooth earphone case(s), house/car keys.

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Based on these observations, it should cost a maximum of 20-22 euros, not starting from 29+. I bought the large size (32 cm height) with a discount at 25. The size seems to be idealized for specific practical preferences.

I will keep it because it seems quite good and spacious to have available for carrying files up to A4 size, small laptops, books up to A4 size, and a folding umbrella, beyond any further unnecessary items if needed