That scope don't have a huge sample rate(specially considering what jyetech pump out of an arduino compared to your much more powerfull cortex M3), but the UI and the refresh rate seems wonderful (much better than the previously mantionned oscilloscope... there's just one bad point for me... and it share it with jyetech oscilloscope, it has only 1 input... or so I understood... I'd be glad to be wrong...