Pros: Price, Portability, Quality
Cons: No low battery warning
I have had this amp for some time now and it's pretty great for the price I paid for it. Battery is pretty decent. I don't really use the Bass Boost feature much because I feel like it's too much... but it can also be the Bose OE/MIE2i that I have used with it. No real complains other than when the battery dies, it simply dies. No low battery warning, nothing at all. Can be charged using any USB port (wall chargers are faster).