 Use of the drive increases battery drain by approximately 10% and the system has been criticized for having very slow data transfer speeds, translating into load times of more than two minutes in total for some games.However this has been improved with the redesigned Slim & Lite PSP which has faster loading times, according to GameSpot's 

Despite its movie and music playback capabilities, the PSP has primarily gaming-oriented controls (as opposed to the controls typical to television remotes or MP3 players)