For a 44lb workstation, they got it here quite quick.  I already have a Z620 I use as a VMware ESXi host for my home lab.  The riser card died, which reduced me to 1 processor and 64 GB of RAM.  The backplane cabling for hotswap bay 2 was dying and the drive would disappear every 2-4 weeks.I moved over 4 4TB spinning drives, 2 SSDs, an Adaptec RAID controller, swapped out the DVD-ROM for the Blu-Ray drive out of my old chassis and swapped out the graphics card with my Quadro 4000 and it fired up the first time.  The drive in hotswap bay 2 is automatically rebuilding (48% as I write this).I couldn't be happier right now... Windows 10 looks funny in Task Manager when you have 32 logical processors - which I had temporarily installed to make sure tbe BIOS and IME firmware was up-to-date.I would recommend this company for any refurbs in the future.  For an old workstation, it looked great. The shipping packaging was excellent and the time to get it here was quick.