DEFINITELY BLADE REPLACEMENT.
After a short period of use, the chain would come off and I couldn't figure out what was causing it. After some investigation, I found the problem: the blade was heating up to a point where it would "tighten" and block the chain. I realized this when I tried to rotate the chain by hand. Once I replaced the blade, everything worked fine. As for durability, only time will tell as it is a relatively new product.
UPDATE:
After replacing the blade and chain - not particularly expensive, I used it to cut logs ranging from 10-15 to about 40 centimeters thick. It works very well, but it requires full throttle and full immersion of the blade, even for smaller logs of 30 centimeters, otherwise it easily stalls and you have to restart the work. DEFINITELY A LITTLE ADJUSTMENT AND PROPER WARM-UP BEFORE USE.
Also, something I noticed is that the "clamp" next to the chain easily gets misaligned, as well as the safety angle piece at the bottom of the chain, and you need to be careful not to let either of them touch the chain.
However, it is powerful and doesn't seem to struggle, considering its engine size and the price. But I consider it a major FLAW that the blade needs to be replaced, which is an additional cost that you can't budget for before purchasing.
LATEST UPDATE AFTER EXTENSIVE USE:
It gave me a lot of trouble at the beginning due to a small adjustment needed in the carburetor's fuel supply screw, it was obviously clogging and unable to work properly. With a little tweaking (turning it right and left and testing), it works like a charm, it doesn't easily stall like before, and it doesn't lose power at low or high RPM.
CAUTION: All of the above until I needed replacement parts!!!!
It is VERY DIFFICULT to find replacement parts for the carburetor, and it costs about 80€ in Greece, in ONLY ONE store where I managed to find it. Comparatively, carburetors for Husqvarna cost half as much from what I've seen.
Finally, after taking it for maintenance at a store, I pointed out the possible need for hose and fuel filter replacement, and they assured me that "it's fine." I had a problem because I went to cut logs and I encountered this issue. And for some reason, the electronic part didn't seem to be getting power, so I replaced it and it presented the same problem, and I thought that the electronics were burning for some reason. When I contacted an official Husqvarna service, the problems were resolved.