The only bad thing is it might not come with everything like the charger, manuals, or OS disc.
Their open box policy.
Open Box Product
Open Box merchandise are products that have been purchased and delivered to other customers, and then returned to Newegg. Open Box products are sold considerably under cost. Newegg tests Open Box products for basic functionality only. Due to the varying quality of products returned to Newegg, Newegg makes every attempt to supply the original accessories for Open Box products. However, regardless of what the product description says, Newegg only guarantees that you will receive the product itself, accessories may or may not be included. Bear in mind that your open box product may not contain cables, adaptors, manuals, CDs, drivers, fans, etc. Additionally, the product may exhibit cosmetic imperfections as a result of its having been previously opened. Newegg will not send you any missing accessory, even if the accessory is required in order to properly make use of all the product’s advertised functions. While Newegg does not like to discourage sales, please purchase open box products only if you know how to deal with potential missing accessories.