Honestly I was incredibly surprised by the quality of this. It was basically new, and I can’t find any flaws with it. I run it completely with an external SSD drive, so I don’t use the built in storage because it is obviously too slow, but the SSD was cheap, and it all works together like a new imac. There have been a couple of screen ‘blips’ every few days, but it hasn’t effected the performance of the computer, and I’ve used it for 2 months now!