Pros: Price, quality, sound, versatility,long battery life,small size
I Love this product! I currently use it at work and home as a USB DAC for my computer. I aslo use it on the go with my iphone via a Fiio's LOD3 cable. It sounds great from all my sources! I currently only use it with my Earsonic SM3's IEM's. But what's so cool is that in the future if I want to get power hungry full size cans for home use all I have to do is get Fiio's E9 desktop amp which has a port for the E7 and i'm all set!
The E7 is completely silent, no hiss whatsover. It has a smooth non-colored high end sound, I don't even find the need to EQ my source when i'm plugged into the E7. The bass boost is cool, although I don't use it with my SM3's, but it's nice to know it's there in case I get bass light phones. The build quality is top notch, works on any computer I connect it to, never had a problem with it. Battery life is insane. Great job Fiio!!