I purchased a Lenovo ThinkCenter Business Desktop from REFURBTEK in September 2019, and can easily assure you it has been an asset to my company. I was hesitant about buying a refurbished computer but needed to upgrade to Windows 10. Laptops are nice and making a transition back to desktops took lots of research.REFURBTEK gets a ten star rating for customer service, easy activation for Windows, and quickly response to any calls or emails. My special thanks to Andy who assisted above and beyond the call of duty! Will I use this REFURBTEK again? Absolutely! You get what you order and it was fully tested and ready for me to use with hassles.I plan to buy five or six units in the near future. I'll be happy to take whatever models available. This Lenovo was the first I've ever used. I've been a HP and Dell buyer over the years. I see no major difference between them and  how the Lenovo performs.