We purchased the computer from Aventis Systems. Amazon's Amazon Renewed program does a disservice to system refurbishers since it lumps them all together. You have to be sure you are buying from a solid company and Aventis Systems is a solid company.The computer arrived quickly and before the promised date. It was packed well without any issues. There were no issues unboxing since Aventis ships the computers using a limited amount of cut foam that fits the PC in the box. Other refurbishers will literally entomb the computer in the expanding foam and you have to *cut* it out of the box.The HP Z420 Workstation is a beast. The CPU score holds up well in today's environment. We use it primarily for browsing, document creation, video editing and other normal items. We did add a MSI Graphic Cards GT 1030 2G LP OC, Low Profile card and it fit and worked without an issue. Very satisfied and you will be, too, depending on the seller you buy from.