The full-sized keys are a good thing, but in several important ways this EK-50 is inferior to the MicroArranger (and Pa50SD.) If I were in the market for an entry level, battery-powered keyboard, I would choose the Casio CT-X3000 over this. Better still, just drive a Roland BK-5 from an external power bank (i.e., laptop charger), and take my chances on voiding the warranty.