The Pioneer Inno is everything you could want in an mp3 player, plus a little more. There are many places to start, so I'll begin with sound quality.
The sound quality is excellent, having great speakers that cancel out most outside noise and allow for a crisp sound with every detail heard. Even the bass sounds great and is noticeable, something not usually identifiable in basic head phones.
The added XM Radio, which has cd quality music, is a must have. Recorded content couldn't be distinguished from a cd, its the clear! The variety of music played and channels available make this a must have. The additional features tied to XM Radio are well worth it.
With 1GB of space, there is enough room to hold plenty of music to listen to, and if you decide to want different music, removing music is very easy to do.
Everything is explained, and the menu's are very easy to navigate. Adjusting volume, bass, and trebel, as well as lighting options and other features only make this mp3 player more of a high end product.
Overall - very worth the money, especially if XM Radio interests you.