I had from my old school or GTR, but needed for studying a ncht programmable TR, and I chose this because he approved TRs even with the most can and a very reasonable price has! I will not list them, what it can do, standing up, I just want to say that I've gotten used immediately to this TR and the operation is truly intuitive, and thus represents the change (in particular because of the natural displays) the GTR to this "normal" TR no problem. Very great part;)