The headphones are satisfactory in terms of sound quality and comfort, but the microphone is completely non-functional for my needs.

Pros:
Sound Quality and Comfort:
The headphones deliver satisfactory sound quality and are comfortable for extended use.

Build Quality:
The cable is 1.5 meters long, braided, and of high quality, which ensures durability. Mic is also attachable.

Value for Money:
For €20, they offer good performance (excluding the microphone), making them a budget-friendly option.

TRRS Connector with Splitter:
Comes with a TRRS jack for versatility, and the included splitter makes it easy to use with PCs.

I paid €20 for these, so they’re decent for the price if you don’t need the microphone.
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Cons:
Microphone Issues:

The microphone has severe cross-talk issues, picking up system audio even at low volumes.

Unusable Microphone Performance:
At low-level volume (60) or without 10dB boost at low volume, the mic is almost non-functional, and with it, it captures all surrounding noise, making it impractical.

Noisy Background Pickup:
Even when the headphones are the sole audio source, the mic transmits all computer sounds to the other party.

Limited Solutions for Cross-Talk:
Users are forced to mute the mic or background audio or resort to an external microphone to avoid the issue.

Conclusion:
These headphones are a solid choice for sound quality and comfort at a low price, but the microphone performance is a significant drawback. If you don’t need a functional mic (long sessions, gaming) , they’re a good budget option.

The most value for money purchase I have made, for years now. I bought them for my sons about 1-1.5 years ago, while I had tried 2-3 other brands in the price range below 60€ like Razer BS V2, Steel Series, etc. When you have kids, the secret is...the detachable cable!! They literally fall apart and you have to throw them away. Here we have a detachable cable, huge +++. I read a review that they have a clip on the side of the earphone and when it breaks, you throw them away. No way, they just didn't bother to find the solution. The cables that exist and you buy (stereo male plug to stereo) work PERFECTLY if your phone has a case (they have a step for the thickness of the case and "bypass" the clip mechanism).
It is worth mentioning that I have the Sennheiser Game ONE and I am a very strict judge when it comes to sound quality, microphone, comfort, etc. They are PERFECT for the 30€ they have been costing for a long time, not to mention the 19.9€ that some shops offer them occasionally. The price is truly laughable!!! Their speakers are quite good, loud in volume, with decent bass and highs. They are very comfortable, they don't tire you for hours. The only thing that might personally bother me is the complete isolation from the surrounding space, having gotten used to the Sennheiser where you can hear what's around you, but that is purely subjective.
What made me write a review (I don't do it often) is the price of 20€ that I recently saw, as even the 30€ is really a steal!!! If I had bought them for 80-90€, I wouldn't be upset at all, their quality is for this price range!

I have had these headphones for several months and they have pleased me very much. Initially, I tried them for gaming on a console and because they had an adapter included, I bought them because now I use them for my computer. The sound, the microphone, and the quality are excellent. As for comfort, I have one complaint because the headband is a bit big and I have to have them fully extended, but they still bother me a little. Also, the feature of the detachable cable and microphone has pleased me very much. However, when I tried them on the computer, I noticed a problem, the cable didn't fit well in the computer port. I managed to fix it recently, but if you want to use them for a computer, you have to have it quite close to you.

Update: I still have them after almost 2 years, they still work great, nothing has broken, now they have adjusted to my head and sit better, and nothing has deteriorated. Now, from my experience, the sound isolation is not good, meaning that if I play games and someone speaks close to me, I can hear them but I can't understand what they're saying, I have to take off the headphones to understand. Music is great, very good bass and sound quality, but they are not user-friendly for other tasks outside of sitting at home. However, I bought them for around 60 euros, now that they are 30, get them without a second thought.

Overall, a very good purchase at 58 euros at the time of purchase. The review is written a few months after use. Overall, very good packaging and a pleasant surprise is the cloth case provided for transportation. As for the construction, very good build quality, all plastic of course but definitely not the typical cheap kind. Sturdy and imposing headset as a whole. Extremely comfortable no matter how long they are used. Honestly, I don't want to take them off my head. They fit perfectly and their adjustment is easy without any issues. The headphone cushions are of very good quality and have memory foam on top. Now, regarding the sound, they are NOT ideal for music. Generally, I am involved with sound and I had the opportunity to notice some things that I didn't like about their use for music. Initially, from the first moment, they have a very strong sound but with not so good proportions. The bass is very intense, to the point where it personally tires me at times. You can adjust the bass levels from your speakers but that way you lose some clarity in the sound, which is already lacking in the headphones. Apart from the bass, the sound seemed excessively bright and a bit shallow to me. The sound/bass ratio leads me to the conclusion that they are not the most suitable for music. Of course, this is not necessarily a bad thing for everyone, especially since their use is mainly intended for gaming. In this aspect, there is no complaint. Precise positioning in the game and a clean, deep sound that truly immerses you in the atmosphere of any game, unlike their use for music. The microphone is clear and powerful. As for sound isolation, as a construction, I can't say it's satisfactory when you simply wear them, but when they are in use, they don't allow any external noise to bother you, which further enhances the gaming experience. Finally, although it is generally a nice headset with nice colors and details, I can say that I miss the Cooler Master logo on the sides and aesthetically, it gives me an uncomfortable feeling of imitation. Overall, I can say that I have fallen in love with them and they are definitely value for money at the price of around 60 euros that they were purchased for. I am willing to overlook the aesthetic aspect, which is a personal preference, as well as the fact that they didn't meet my expectations in the music aspect initially because they were not purchased for that purpose, and secondly because the positives (comfort, gaming, construction) obviously outweigh it.

Excellent build quality!

Detachable 3.5mm fabric cable that doesn't tangle with ANYTHING! Let's say it breaks at some point, you just get a new cable...

Also, detachable microphone!

Very comfortable ear cushions!

Great size adjustment to fit on the head!

Sound: truly crystal clear! I haven't tried them for gaming yet, only on mobile and music from YouTube.

The bass seemed very satisfactory!

After a few days, the microphone stopped working, you have to fiddle with it, adjust it to see if it catches any sound... with very careful use.

I was called by the store and they told me that the product will be replaced, as it is not repairable. I couldn't find the same model to buy, so I ended up changing brands.

There is no dealership that supports it in Greece from what I understand. I had sent them an email, no response. So what's the point if it's a quality build, or if it has a detachable cable and microphone if you can't buy spare parts...

I give it 2 stars for the very good sound quality that I managed to hear for at least 5 days