I bought these to check out as they're fairly cheap, and i wanted a closed back alternative to my Superlux HD668b which i love. Here's my opinion of them after a few days of use..
Comfort wise, no issues there and i can wear them for ages. A bit heavy but they don't feel it when on your head. They don't clamp heavy either which i like.
The cable is non detachable which i don't mind but its fairly long, you'll want to use a velcro strap or similar to tie some of it up if you're using these in public.
Isolation is not the best, tried using them on a bus and sometimes found it hard to listen to music, i'm using the 32 ohm version and even then i found it hard for my phone to get it loud enough. A simple preamp boost on VLC helped there but in quieter locations & using them with my audio interface at home they were perfectly fine.
Music wise, i'm not sure how i feel here because with modern tracks the bass and treble are there and that's when i like them, but on some older songs its lacking & feels like there's something wrong with the sound. If your audio isn't great then these reflect it. While listening to dance music i found the bass isn't the best, the sound feels more neutral & i prefer my Sennheiser HD25 for that better low end.
Build quality is okay, the plastic holders that the yoke is held into on the side of the cups feel a bit sharp on the corners and could do with a light sanding. The headband cushion is comfortable but not replaceable, when it wears out i might pick up a Beyerdynamic one and try it.
Overall opinion.. I'm very happy with them for general use and i like how they look and feel.
Just the problem with music i'm not too sure about yet, i have other headphones to go to for that use case.
For things like Youtube, watching movies, or maybe some gaming they're great and a good budget option.
They're a big bulky headphone so you might get a few stares if you decide to wear them in public, i did when i tried them going to work.
If you don't have the money or want to try more expensive options i would say get a pair, you might like them.