This was my first pair of headphones that i bought for around 50 euro in 2011. I am Live Sound Engineer, beginner at that point and they sounded good for me , didn't had much money to spend for a better pair, but i must say , that cable even slim like most say, it went to hell and never broke, even other sound guys will make fun of me and after try them out trough rough session , they were amazed is still standing. I have other top headphones where the cable gave up, but not this one. Yes, the con will be if you broke it, is done.
The sound , now after years and many pairs oh headphones, is a bit V-shape, but with a good eq, you can make them sound on low end, with a bit a boominess , but still sounds decent for the money. What is annoying are the mid section somehow feel distorted , without boosting, are not clean in that section, also too many highs for my taste and 4-6 Khz. i can share what eq i did straight out of my laptop, for those who complain about bass, i think for my taste bass is more like subs like, i feel a boost in 60-80 Hz , and after that is a dip. This is what is my Eq for my laptop card: 31 Hz - 0dB, 63 Hz - 0.8 dB, 125 Hz - 0.9 dB, 250 Hz - 1.6 dB, 500Hz - 0dB, 1K - 0 , 2K - (-0.8) , 4k - (-1.3) , 8k - (-1.6) , 16k - (-3.6).
It is a bit muffled and meaty now, but i think from there is a bit starting point, i did it with Fleetwood Mac - The Chain and Dreams songs.

In the end for me , at this point are not some headphones i will choose, but for the money , like i said , is a good starting point and don't be afraid of the slim cable.