Early adopters of XM satellite radio are pleased with their XM purchase, rating the technology as "easy to use" with "excellent" sound quality, according to a study by Crutchfield Corporation, an XM equipment and electronics retailer. Crutchfield says that early adopters of XM satellite radio are predominately tech-savvy affluent men. Crutchfield XM buyers are predominately male (90%), affluent, and between 25 and 54 years old.