Recently I was looking through the site and stumbled upon the service's refund policy.
I think it's great and you should know that you always can ask for a refund if you are not satisfied with the quality.
Let's take a closer look. For example, you have downloaded an MP3 song which is declared to be 320 bitrate. When you have it downloaded you find that it is 128. Well, you have a right to ask for a refund with screenshot attached (where it says it should be 320).
The service will then refund your account for the paid sum, or will credit you to get a free song instead of this one.
Using some imagination will also let you download music for free :)
Learn more about paying with PayPal on music sites that do not accept PayPal, and other MP3 download services.