Does what it is supposed to give without any type noises. Werder under "load", even at idle is something to hear. Not even when you put your ear to the device. The build quality is top notch, and beyond reproach. The USB connectors fit snugly and do not wobble. The 220V line even has a "cable tie" of Velcro material to stow the cable accordingly. The packaging is kept simple, and likewise sufficient. 18 months warranty is fine. The 25W are sufficient to Tablet, Camera, Music-Man to load etc. simultaneously. If that's not enough ... there is a stronger model. (The need then but it is possible more power)