It has very good spaces, decent quality, and decent appearance.
I would say there is a balance between price - size - spaces - quality.
It doesn't look expensive, it doesn't look cheap. [However, the Arctic Hunter B00490, which is of similar price (but lacks in number of compartments and is slightly smaller), appears much more poetic.]
The spaces, both in number and size, are its great advantage. As well as the expansion, which transforms it from spacious to VERY spacious. For the internal small pockets, one could ask for something more sturdy, but they seem sufficiently durable.
What I would like better is the laptop protection. It has protective material, but I would like it to be somewhat more [the Arctic Hunter B00490 has much better laptop protection].
I consider it a good purchase, as long as someone knows they are getting spaces, practicality, average appearance, and simply decent quality.
In any case, due to the possibility of expansion, one can choose this one and not another of similar price and size to the MATEIN.