This one is a game changer in terms of learning off the internet and/or other online guitar online instruction platforms. Even internet videos with embedded speed and loop options, in this case just having the capacity to loop, go back, adjust speed, and clear all setting at the tap of a foot (as opposed to having to stop and use a mouse) makes this an exceptionally efficient devise for learning. I've been studying guitar for years with downloads and online content and this has advanced my learning by light years. And the customer service is very good. (They got back to me quickly regarding a question). My only wish is that they would have this working with Homespun Tapes and Stephan Grossman's Guitar Workshop platforms. I and, I would think, countless others have their downloads, and this would be a great additional benefit.