Audio [Q] Headphones - question / opinions

As a device with one of the highest audio quality there is on both the loudspeakers and headphones
Does anyone who had experience with the device can tell what he thinks about the stock headphones that come with phone?
Do the headphones do justice to the phones hardware or do u suggest to buy a separate better quality ones? I usually prefer to buy a pair of better quality than the stock ones but I've read a number of reviews that said the stock headphones show a surprising good quality of sound.

but is it good enough for the phone?
Opinions?