I am a fan of portable audio and own many good quality portable DAC/amps including the Go Blu, Hip DAC, THX Onyx etc. I knew the Go Bar was well received but it sounds much better than I expected, very lively and highly engaging, this is a bit of a cliche but I really do hear sounds in my music that somehow hadn't caught my attention before.It feels very robust, is lighter than I expected from reviews. The IE Match feature is very useful, I have used the standalone IE Match device with my sensitive IEMs, I find that it somehow improves the sound as well as reducing hiss. It is very easy to use.I'm very pleased with the Go Bar and would buy again if lost or damaged.