Back when I was performing in NHs, I probably could have used this for my backing tracks. My problem was I was too lazy to bring much equipment so I used an Ipod and a rhythm guitar. I figured I made the same money no matter how much stuff I brought.
Now, I am working with an arranger and kicking around the idea of getting back into it, provided I can learn to play the arranger well enough. But at times, the realization of how much equipment I will have to carry compared to my backing track days hits and I wonder what I am doing. The bottom line is the backing tracks are too restrictive for me and the arranger gives you the freedom to try different things. I used to work four to five hours minimum on a track. Sometimes you would play the song and it didn't go over or I just stopped doing it for whatever reason. So all of the time working on the track is wasted. With an arranger, you can try things and if it doesn't work for whatever reason-nothing lost.