I am using it from last 5 months .
This is really awesome in sound
And are really cool , great voice quality
Great base , are really good
Are amazing , just you have to spend some more money , but this is better to use branded and quality product
Where as JBL itself is a brand
You will feel the music , will reach to a different world
Only problem is that they are some what big in size
Some times , some guys will feel odd to use it in public as well some may get trolled also
And u can’t really enjoy it while laying on bed because you will not be free to move how ever you want
You should take care of your hedphones too
But these are common disdvantages depends upon your consideration
And that too
You will feel same with all big hedphones