“It is compact and feels like a quality device…I was immediately taken by its smooth and neutral presentation. There is plenty to like about the BL. Its on-board battery has decent stamina and it is a nice looking device…it certainly performs well and presents excellent value. If you are looking for a versatile and talented portable head amp and DAC, you owe yourself to at least audition the nano.”
http://gadgetynews.com/ifi-nano-idsd-black-label-portable-dac-amp-review/
Many thanks Jay Garrett for your great review