We use Lenovo Thinkcentre computers extensively and they are generally reliable, just as these renewed units from Amazon are. However, sometimes features like wifi and bluetooth that you would expect to be built-in from the description, are actually substituted with USB devices instead. So, you lose some USB expansion without a hub. We've also had a few SSD and 2.5 drive failures after the machines were on for a day or two that required replacement -- the SSD I replaced today was a Helix 256GB.