I wonder about the reviews that some people write. I have been using it since 2019 for cleaning my scattered fields and I have the following to say:

Pros:
1) Large fuel tank (about 1 liter) which makes you forget about refueling and allows it to work for quite a while.

2) It has good power for a disc and easily cuts grass with stems 5-10 cm thick (e.g. wild greens).

Cons:
1) It needs very frequent maintenance (changing spark plug, air filter) which, compared to other brands (e.g. Stihl, which I also own), makes it uneconomical unless someone is willing to also act as a mechanic!

2) The screws come loose very easily, to the point that the fuel tank actually fell off while I was using the brush cutter! This means that every time (!!) you need to tighten all the screws so you don't get an unpleasant surprise.

3) The handle has a hand screw (plastic nut) which makes it completely impractical because no matter how tightly you screw it, it will come loose, so it needs tightening every 10 minutes even while the machine is running!!! In my case, the handle broke after 1 year and I had to install a new one, so its durability is low!

4) The recoil starter is quite difficult when starting the machine, as it usually takes about 5-10 minutes to start, so here too you need to frequently replace the recoil starter. Compared to a Stihl I have since 2013, on which only the engine head has been replaced (since it was stored with gasoline for 1 1/2 years!), but to this day the recoil starter has not been replaced, the Hyundai is far from quality!

Draw your own conclusions.

Update 2025. The brush cutter lasted with proper maintenance by a mechanic for about 5 years of amateur use.
The transmission mechanism broke, which costs more than a new one.
It ended up being recycled.
It is better to look for a branded product with spare parts than cheap imitations.

I use these specific Hyundai grass trimmers professionally, knowing (as anyone can understand from the price) that we are talking about a second-class product. However, this does not mean that it is not worth its money, especially for amateur use, but also for professional use.
However, like any "second-class" tool, the person buying it should know what they are looking for and what they will get back for the money they will spend.

To be more specific, I would like to mention two things:
Positives:
1) Cheap purchase, you don't think much about it and if it breaks, you say: I will buy another one. Whereas if you have spent 500 euros, you think differently.
2) Powerful tool and in combination with a new head (costs 6-7 euros) to use thick nylon thread, it becomes top-notch.
3) Cheap spare parts (which can be both good and bad because at some point it just needs to be thrown away and buy a new one). However, it will have earned its money since a similar branded one costs 3 or 4 times the price of this one. And I doubt it, since I have worked professionally with many branded ones, if what will last me 1-2 years of hard work, the branded one would last me 6-7 years without problems.

Negatives:
1) Trimmer line. It does break easily and requires attention so that we are not "careless" and pull abruptly since it has high compression. If it breaks, replace it not with Hyundai but with another aftermarket one that is more durable.
2) Air filter. After a while, the screw loosens and constantly falls down and you have to search for it. If you use it without a filter and it sucks in dust, the motor will go bad. The solution is an O-ring on the screw that holds the filter cap.
3) The handle that we hold unscrews and starts moving back and forth. Annoying. The solution is to put a rubber band and screw it back in.

These are more or less the issues. I have bought 4-5 of these over the years, they all have the same problems. If you handle them with care, they are worth it.