Kind of robust, battery lasts forever (I use fresh ones for gigs obvsly).
Has the hability to power high impedance headphones.
Just use a stereo jack to get stereo monitoring while recording or rehearsing on the drums far from the interface.
For mono it's perfect, for stereo only with stereo jack. If you want stereo with 2 XLR's buy the P1.
Perfect if you play drums or keys, if you are walking around the stage with a cable attached to you, use XLR so it locks in the socket.