It's this simple:

You can either simply award stars out of 5 or you can write a short review. Customer reviews are not only helpful to buyers, they also help us to improve our products. As a courtesy for your efforts, your rating will automatically enter you into the monthly draw for a £850 voucher, three £85 vouchers and 10 MUSIC STORE travel or laptop bags. Thank you very much. Your MUSIC STORE Team.

You can find the conditions of participation here!