We use these for our church so each instrumentalist has the control over their own mix.
They are fantastic build quality, the sound quality is also very good and it allows for full flexibility from the musicians point of view. Very easy to setup and was "plug and play" into our current QU-32 system.
The documentation was good on the me-1 side but I was missing a note on the fact that they use the QU-32 direct out. This did take a moment to figure out how to setup all the inputs I wanted as well as setting the direct out to be pre-fader and not to follow the mute.
Overall I am very happy with these products and would recommend especially if you already using an Allen & Heath mixer like the QU.