going to have to disagree there. if you buy a cd, then return it the next day saying "you didn't like it" they're not going to refund you the cd, they'll just tell you where to stick it...Most products would allow you to try before you buy as long as you paid for the product before you took it away. Disliking the music that you have received is also, in some stores, enough to let you return the product. I don't think allowing free downloading of all music is a solution, I think it's just another extreme.
working in retail myself, if someone is to purchase a digital product, there is no gaurantee they haven't copied it onto their computer, thus keeping the product alongside getting a refund at the same time.