Pros: reasonable cost
Cons: none noted
Brand new to the whole world of portable amps, but a really long time hifi addict.
Bought this unit on recomendations of others online, and am not disappointed. I have nothing to compare it with of course. I am waiting for a converter to use it on my iPod proprietary slot, so I have tried it only on an Android phone and a Sony MP3 player. I have a variety of headphones, from Sennheiser to mee to Koss, and I must say the sound improvement is quite noticeable. Very pleased with the features, ease of use and available output improvement.