The built-in audio player is easy to use and has a lot of functionality. The inclusion of MusicMatch Jukebox software is also good since you can resample songs through it. You get all these features in a surprisingly small package. The SoundsGood is a standard sized Springboard module and virtually adds no size to the Visor. The Visor cover could even be placed on the back while the SoundsGood is installed.
Size definitely matters when it comes to the portable world.
The external controls allow the use of the SoundsGood while the Visor screen is off. The SoundsGood already consumes very low power so having this feature helps even more. In addition to those, the SoundsGood can be used as a standalone MP3 player with the use of the EnergyClip accessory that's sold separately. The SoundsGood is a great product so there really aren't that many cons. The memory isn't upgradeable so you are stuck with 64 MB for life.