The installed power supply is insufficient for USB 3.0 ports for someone like myself who is using all of them at once.  I still gave it a 5-star rating since most people will find this computer to be exceptional, including myself. A slightly more powerful power supply would've been nice but the price would've increased.  I'm happy and content with what I received for the price I paid.  Just be aware that you may get power fault warnings on the USB 3.0 ports if you're using all of them at the same time.  This was a very fair offer.  The PC was in like-new condition and arrived packed very well.  I would definitely buy from this seller again. It's been 4 months and I just love this computer!  You are going to want to bump up the RAM to 32GB if you're a heavy user. Ask the seller to do it for  you before you purchase.  UPDATE:  August 28th, 2020.  Despite bumping up the RAM and the BIOS indicating I have 32GB, I did not notice an improvement and am constantly having freezing issues as a result of 10 or more tabs being opened for Google.  The same thing occurs with other browsers.  I installed a 500GB SSD with Linux Mint 20 and it runs absolutely incredible now. Super fast and can now have 20 tabs opened without a glitch.  Linux also recognized the Creative Soundblaster Audigy card I have installed so I use this system for playing music and videos especially.  November 13th, 2021:  I am still using this computer for Ununtu and Linux. It wasn't built to be a Windows computer.  Linux works amazing!  I still love it!  UPDATE:  It's October 27th and I still use this computer as a Linux system with 32GB of RAM.  It is perfect for Linux, but I'd advise against anything else.  I am using Zorin OS Pro and still using original hard drives.