I had this product a good while, and had to buy another one since I lost the first one.
I use this little box to merge two MIDI controllers, a keytar and a Nord used also as MIDI master, into my main sound generator's MIDI input.
I would say the main advantage over some of its competitors is the lack of a need for a power adapter, meaning less cables flying around AND not being dependent on an external power supply. Power is drawn from one of the MIDI in.
It's light, sturdy, and it has survived years inside my lead box on the road with no padding / protection whatsoever.
No detectable latency, no crashes, no panic. It does what it says on the tin.
This item is really great for merging midi if you need to get two midi devices into your computer via an audio interface. One of the midi inputs is powering the unit so there is no need for you to plug it into your mains socket. In fact there is no mains plug on it.
One word of warning though, a irig midi device doesn't have enough juice to power but any regular synthesizer or digital piano should have plenty of juice to power the unit.
It is a very solidly built unit and it gets the job done! I would recommend it to a friend.
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