I think this player sounds quite good, especially considering the low cost, but the sound you hear will, of course, depend on the earphones/headphones you use with it as well as the quality of the music files you play.

The build quality is extremely nice but the first time I inserted the sd card it was

The M3K has great build quality and design, a surprisingly good screen, good sound quality, and overall is pretty decently valued considering it packs all of the above in such a low price point

Sound quality is great, I don't believe in the HiFi sound

Great build quality and battery life, nice screen, good sound, pretty quick with no software bugsCons: Recordings are too quietDesign, ergonomics and build quality

But it sounds great in player mode as well as in external DAC mode