For $15 you get a tool that allows you to use your iPhone to practice between sets, quickly record ideas, use iTunes to work out parts of songs ( ACC support could be better) and with iRig ( the extra cost ) carry only an extra part conveniently in your pocket. So for $65 ( $55 without 4track. I paid $40 for a headphone amp ) I dont have to carry around a headphone amp with extra cable for iPod or iPhone when I already have my cable with my guitar. I now have 4 friends that say me using it and got one for themselves.
rwfsr about AmpliTube Fender™