I bought this unit to act as a MIDI host. Before this unit - to play an analogue synth (DIN midi) with a USB midi keyboard I needed to connect them via Ableton + PC as a midi host. This unit replaces Ableton and the laptop in that scenario making "set up and play" much more straightforward. It's a small, well made unit. Downloading the software and updating the firmware was easy and quick, and then it was simply plug and play. Customer service was excellent - I am new to midi so I had a few newbie questions and they were very patient with me! If you use the 9v power supply rather than USB C 5v - be aware your 9v supply (like a guitar pedal supply) needs to be of reasonable quality, not expensive - just reasonable. When I used a very cheap one it introduced artefacts to the midi messages.