The keys are semi weighted and although it says they are the same as the 900 they feel better to me. It's cool that there are little lights on the volume, balance and assignable knobs. My one worry is that all the buttons are shiny black plastic buttons and I've got lights of lights above my keyboard rack and there is a lot of glare. I don't know if this will be annoying or not when playing out under lights. The additional sample rom is very noticeable in all the sounds. It's nice and light and looks really good with the pop up screen. Internal speakers sound great. I like that there are 2 usb flash drive ports and a SD card slot hidden in the back. What else do you want to know?