ashley smart 4 pro: very easy to use and understand - st it button upwards, long push to turn on/off, short push to set multiple, then flip the time face up to start timing. Flip the button face up to stop timer. The timer length is multipler x time facecons: its a bright blue flashing light, i would have preferred red leds as they are easier on the eys in low light(and a black cube face with red leads would have been a nicer style)Con: 4 stars because i had to pop the button face off and rotate it 90degrees as the cube was put together wrong in the factory, usb port needs to be beside the 15min face, seconds to correct if anyone else gets one rotated out of position