We installed this interface on our teacher's computers in a college setting, where we are teaching hardware MIDI routing and demonstrating physical MIDI connections.
We'd tried using the USB - MIDI cable based interfaces for a long time, but the labelling on them isn't as clear and we found we were getting through a lot of them as they weren't as robust being plugged and unplugged.
It's completely class compliant on OSX and just appears as In / Out 1&2 in your software without any need for additional drivers or installations. It has activity lights on the input & output that the cable based adaptors don't have which helps with the demonstrations and understanding as well.
Rock solid little box you'd really struggle to damage it if you wanted to.