Pros: Deep, rich music. Truly changes the way I experience sound
Cons: USB cord is slightly bulky, manual and controls are poorly written/have bad interface
When looking for a dac/amp, everyone recommended the Fiio E7. It's a small, compact combo, and is extremely good. So far, I have found it to be stellar. When using my ATH M50's, the sounds truly change. Coming from a computer without a sound card (only a measly sound chip), the difference was stunning. I repeatedly compared my music without the dac/amp and with it, and I can say it is absolutely worth the 50 dollars I spent on it.
Extremely satisfied with my purchase, the only confusing thing is the poorly translated manual.