This is a smart suitcase, even with a charger, my only concern is going up a short flight of steps, say may be 2, 3 or 4 steps, it may not save any effort there. And secondly is going down a long flight of stair, going up is no problem, but what about going down? To pull behind a heavy suitcase may not be as easy.
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Yes, you are right @pigrimlife. Maybe it will be better to carry it in a regular way while climbing down. Thanks for your comment and support.