The headphones are very good for their price. The cushions are very comfortable and made of thick leather. The earbuds are made of silicone and are very easy to insert and remove. The sound is very loud and the bass is also very strong for me. The microphone is okay, I don't even need to extend it to be heard, but all the sounds in the surrounding area can be heard as well. It has minimal noise cancellation, just enough to not be heard when typing. I can't say anything about the blue color because I received them in the wrong color, pink, which is actually very beautiful as shown in the pictures. The RGB lights are stunning, maybe the best I've seen in headphones, very stylish and look just right.
They may not be suitable for larger heads, but as an adult with a relatively small head, they are okay for me. They have the ability to extend the headband and rotate the ear cups. On the first day, they were a bit tight, but they didn't bother me and now, 3 days later, they have loosened up and are still comfortable even after 5-6 hours. Overall, the plastic is soft and flexible and seems to be of good quality.
I bought them for €24 and it seems like a very good price (although I received the pink color). At €30, due to the almost non-existent noise cancellation, I don't know if it's a good value for money.

As someone who does extensive research before buying something, I ended up with these headphones and I am extremely happy. Here is my opinion on the product:

1. The design is (of course) beautiful and resembles Razer-type headphones (especially the Quartz Kitty Ear ones).

2. Their construction is sturdy, with cushions under the headband and very comfortable cushions on the ears. Overall, they have a very nice build as the pink color is exactly as it appears, soft, and their plastic is relatively flexible - something that makes them quite durable and they don't break/distort when taken off hastily, etc.

3. Their sound is very good (I haven't tried more expensive headphones, but personally, it didn't bother me THAT much) and the microphone is very good! I use it for calls and teleconferences, where I am heard very well. Generally, it filters out external ambient sounds, but moderately loud sounds can be heard if they are strong enough. The microphone is also directional.

4. Quite noise-canceling.

5. Very comfortable (I wear them for hours and they don't cause any discomfort) and they don't press against the ears. Also adjustable (I typically have a large head and yet I didn't need to adjust them much), where the headband still has a lot of room.

6. They connect easily (only 1 USB cable, where there is a small switch for the lights, the microphone, and the volume).

7. The ear cups don't come off unless you really want to remove them, and they look perfect (obviously).

8. The cable is long and excellent (covered with threads to make it more durable, it seems).

9. Overall, incredible headphones and they are very much worth their price (around 45 euros).

UPDATE: 28/07/2022

The headphones are still a great value for money and very convenient. I mainly use them for calls and gaming now. As someone who wants to hear ambient sounds, I can say that the noise-canceling bothered me a little (I know, I'm peculiar) and I wear one earphone each time. However, for calls, it continues to work perfectly, and when I wear both earphones normally, you have to tap me to get my attention.

I have now purchased a new pair of headphones with the purpose of connecting them to my mobile phone as well (wireless & 3.5mm jack), and I really wish they worked with other devices too.

After about a year (approximately), the cover on one of the cushions has worn out a bit, but with VERY heavy use! I often mishandle them, put them in a bag/backpack without any cover, wear them with wet hair, etc. I am very satisfied. Also, I forgot to mention earlier that the ear cups are removable and the headphones still look perfect without them.

The only thing that bothers me is that after a long period of use, having now tried other headphones as well, I find them a bit heavy. But it's not that tragic, I suppose. Now that their price has dropped a bit, I still find them very much value for money!

I recommend them 100% to anyone who wants pink headphones/with ear cups for aesthetics, but also for general use! :)