We've used to use this product while it was still being developed in our Studio, it worked a charm and it really makes the process of having music in the studio more democratic! Everyone can choose different tunes so at the end of the day everybody's happy!
It really takes the hassle out of creating playlists within a group of people.
Use it enough and it will learn enough of the group's music tastes to run on autopilot if you want it.
I've been testing hand the dj for about 6 months now, and it's just a blessing to have it around the office.
Had the Beta running at POSSIBLE London for months now. We love it here!