I have three tab apps on iPad, and this one is the slickest by far WITH Guitar Pro tab files (various versions supported). The score scrolls (speed variable) with the notes highlighted on the score, the notes appear in position on the fretboard or keyboard, plays multiple tracks/voices... very cool. The app supports uploading / downloading tab files from the computer. But Guitar World has not gone the whole way, and offered easy download from a library of free (nice!) or low-cost Guitar Pro tab files from its web site. You buy the expensive Tab Toolkit app, and youre soon wondering what to do with it! Searching on the web for tab files produces a few. I found just text-only files on Guitar Worlds web site, and for those this app offers NO BENEFIT AT ALL, save your money. Elsewhere on the web there are lots of promises of Guitar Pro tab files, but they seem to be offered the way free porn is offered (I hear!) ... lots of offers, not much given away. If you have a good library of Guitar Pro tab files already or know where to get one, or if you have Guitar Pro software and are willing to make your own tab files, buy the Tab Toolkit app, youll be very pleased. Otherwise, save your money... within half an hour youll find you have nothing to do with it!