A fakebook is a musicians resource. Paper fakebooks consists of simple melody lines in standard notation with guitar chords. Fakebooks give musicians access to a larger repertoire of tunes than they can memorize. This site goes one step farther. You can hear the tune and play along.
Learning new tunes is easier because the MIDI provide a ready practice resource. If you use a program like the free van Basco Karaoke MIDI player, you can adjust tempo and mute voices to make learning even easier.
Note: the van Basco player is a Windows only program.