Pros: good sound, small size, long battery life, nice design, good EQ
Cons: maybe it would be better in metal
Nice successor of famous Fiio E5. Totally redesigned. Now it's all plastic, but weight reduced about 2 times. And it doesn't looking like iPod Shuffle now.
Also now it have more flexible EQ, able not only boost bass, but do more work.
Combinig with steal-like price and nice overall design - it still have outstanding sound, as E5 does.
So it's really worth buying option.
But personally I really did not like the E5 because it produces a LOT of background static that grows a lot louder when upping the volume. This problem seems to be typical because many reviewers write about it.
I really hope they fixed this by using different hardware, then it might be a great little amp