Good. The increased thickness of the blade gives the impression of a stronger blade, but also a shorter one compared to the Compagnon, so it behaves as more robust. The carbon version indeed shows a very slight sense of oxidation after 1 month, but with just a paper towel and a bit of oil it becomes like new. The big difference is the impressively easier sharpening process compared to the stainless steel. Very nice feel in the handle. It's a tough choice between the HD Compagnon and the Robust. Unknown is the length of the metal inside the handle compared to the Compagnon. I have the stainless Compagnon but in the end, for a first purchase, I would get the HD or the Robust. For wood cutting and tough tasks, the 3.2 mm blade is a one-way street in any model.
I recommend it like thousands of others, not by chance. You won't believe the price for such quality. It's "dirt cheap," YES with your eyes closed.
I add for first-time knife buyers for outdoor use, "don't fall for" Rambo-type survival knives, very heavy and completely unnecessary. Even the famous batoning I see in countless videos to light a fire (supposedly...), is not a reason to carry knives like swords as if you're going to face a 300 kg grizzly.
Morakniv is just fine for anything.

Robust and not Rubust.

POSITIVES
1) Durability: Its blade is made of Swedish carbon steel (12c27) that has undergone the proper heat treatment to withstand. You can drive it into tree trunks, hang it, and it won't break.
As one can see in the total destruction tests conducted by Mr. Joe X on YouTube, the knife does not lose its tip. Despite hitting rocks and metal(!), its edge naturally wears down but ultimately does not break or crack. In the tests of brutality it undergoes (impact, bending), it proves to be indestructible/unbreakable. It withstands much more than other knives priced at 300 euros with exotic alloys (super-steels).

2) Functionality: It cuts satisfactorily and is easy to sharpen. It performs well for general use, woodworking in the forest, survival, etc. Additionally, with a modified back grind (90°), it can work with a fire rod as a striker.
Its handle is ergonomic and extremely lightweight. You enjoy holding it in your hands.

3) Aesthetics: This knife is from the Swedish side, so we're talking about a beautiful Scandinavian grind (Scandi Grind). The plastic handle is also satisfactory and stable. The plastic sheath is good, simple, and convenient.
Blade length: 9cm, thickness: 3.2mm, and weight: 133 gr.

4) Price: Around 12-13 euros.

NEGATIVES
1) As carbon steel, it theoretically has greater sensitivity to water and acids. Although I haven't observed any rust so far, cleaning/drying it is a good practice.

CONCLUSION: Functional, beautiful, sturdy (robust indeed!), and above all, low-cost, the Mora Robust is a knife that will last a lifetime, suitable for general use as well as tough tasks.
In terms of durability, it is Morakniv's number one. It surpasses even the popular Mora Garberg