There are better apps out there.
I really wish that carriers would understand that most people do not want applications on their phone that they did not install, and most carrier installed applications aren't very useful.
The only way to uninstall these Sprint installed applications on my phones has been rooting them and then scraping out the applications I don't want with a screwdriver (figuratively).
I gave Sprint music a try for giggles and it seemed to have problems recognizing my music collection. It showed all the files that came "default installed" with this application but none of my own music that I put on it. My music showed up fine and played fine in other applications so I know that it wasn't a problem with the music files.