So after having X1 for a few days review:
1. Initially does not read one of my MicroSD. Gotta backup my music, then format the card using X1. Now the 64GB card is working well.
2. Scrolling is slow especially if you have a long folder of 100 plus songs.
3. Scrolling is noisy
4. Middle button is noisy (in a quiet room the others are disturbed by the clicking sound)
5. Doesn't play anything I throw at it. I guess I might have some non-standard .ape and .m4a because I get a "File not supported!", and yet I can play those files on my smartphone.
6. Small and handy, nice feeling when holding in hand.
7. Good battery life!
8. Enjoyed myself listening to some FLACs on it.
Overall very budget, value for money. Comes with nice feeling silicon pouch, nice stickers, good documentation, and a microusb cable. Though it's still sad I cannot play some .ape and .m4a files (my files might not be the standard format).