I have downloaded a few Jazzbacks now. They are professional and sound great when we do gigs as a backing track. Mack The Knife is one of the best and I really like the arrangement.
These backing MP3's are so much better than the 'midi files' you can download from the net.
The process of downloading is really straight forward and the lead sheets cut down my workload significantly.
I will of course continue to utilise this service and congratulate you on an excellent product.

I have been buying backing tracks from Jazzbacks for about 9 months now at an average of one per month. I find the process of choosing, buying and downloading very simple and straightforward. The product itself is excellent and includes lead sheets in the relevant Concert key and for both my alto and tenor saxophones. Add to this the very professional sounding mp3 backing track, lyrics and arrangement, and you get a lot for your money !
The bonus points system is very customer friendly and I even received a free update of one of my purchase !
Larry himself has been very helpful and patient with my ( sometimes ! ) simplistic questions, even responding to recent emails from his phone while on holiday.
I am delighted with my Jazzbacks experience and would highly recommend any aspiring musician to give it a try.