The MIQRO C is difficult to use mainly because of the inadequate instruction booklet. There is no instruction to remove the plastic battery cover that cannot be seen below the battery lid. Also, the instructions say to press the button once to find the battery level, and 3x for scroll thru the vapor path, but never state that the device should be turned on first. There is a separate mouthpiece that must be put onto the device for use, because without it the device is almost unusable. The vapor tubes are small and black and impossible to tell by sight whether they are clean or dirty. Having been spoiled by the simplicity, glass tubes, and single press button of the original DaVince Ascent, i find that this device does not compare well.