Purchased at the end of September this year and used for about 3 weeks, mainly indoors and when going up and down the stairs in the apartment. No smoking, no pets. There are no noticeable scratches. I will disassemble it to the minimum extent necessary to fit in the original shipping box and send it with the instruction manual. There is an official assembly video on YouTube (iWALK3.0 Assembly Instructions), please watch it with Japanese subtitles.