On an SP4 Core m3 with 128GB SSD. it finished the erase and was doing setup in about a half hour. From the time I started to completing the packing, boxing, and labeling all ready for UPS was 1 hour and 15 minutes. I packed it really good, included return label inside, Hazmat labeling on the outside, and the UPS return label. YMMV if you have a larger SSD or if not doing a Surface, an HDD.