I think these are made as workhorse headphones,
they sound ok, they eliminate much of the outside noise, you can wear them for hours and if you break them to the point of no repair, well, it's 88€, you can buy another pair.
The low end is surprisingly deep and not compressed so I'm hearing things a lot clearer below 60Hz, the high end is also clear yet a bit harsh, but there is a lack of 80-200Hz and at the same time the sound is a bit boxy and hollow.
Good enough for the price, the pronounced high end helps most singers when tracking but the lack of body confuses vocalists like me that have deep voices.
Also as an engineer I can't make any proper EQ decisions with them because the mids are all over the place.
Good enough sound and isolation for tracking,
for mixing good enough for checking kick-bass relationship and offensive high frequencies, so I'd use them for edits before actually mixing and as another pair of headphones to check my final mix/mastering just in case.