Here's my subjective opinion:
I am absolutely delighted with this small miracle of sound. The Sony SRS-X3 can not record with the Bose-mini on bass pressure but he is superior to him in sound quality as much as a cell phone a Dosentelefon (ok an exaggeration but who presents these two side by side will realize what I mean).
Regardless of the volume he never comes to waver. The treble sound clear and not tinny depths strong but not dominant. A very good all-rounder.
Of course, who wants fat bass sound should go elsewhere but mature whom it can safely access comes to a generally sound beautiful and certainly will not be disappointed. The only downer when the battery wears off the speakers on at about 20% down to half volume. So you can then again 1-2 hours of music genius but just not at full volume.
An AC adapter is commendably here and nichtnur a microUSB cable.
A note from me to the users of the app-Poweramp. Do not use it with this unit, you will have it no fun. Maybe it's my settings but in the app it sounds constantly as if the sound rises in waves and decreases. not very nice and spoil the listening pleasure.