I bought this machine because of price and the power which it would provide.  I did not want to pay new system prices so I decided to try a refurbished system.  If quality control is good and testing is sufficient there should be no problem.  And if I got it and it did not work properly I could send it back (not a option I desired but one I could live with).  Even new equipment can come broken from factory  (cracked solder joint, improperly seated memory, or CPU).  As long as a solution existed why not try.  And if it was defective what better way to determine quality of support.  I received the system faster than expected.  It was actually Federal Expressed to me.  However it did not work.  I received it late Friday.  Of course not tech support on weekend so I had to wait until Monday to start the process of support.  The machine would power on but no activity on the hard drive and no video so I could get to bios and troubleshooting.  My initial reaction that the memory chips may have become dislodged in shipping, one indicator of no video is loose memory chip.  I opened up and reseated both chips no luck.  I checked all other connections such as HD cable etc.  I then began to get 5 short beeps.  So I waited until Monday and called early.  The typical reaction let us send a part and replace.  Their suggestion was a Hard drive I convinced them it would not solve the problem.  I would prefer to send the system back and it be replaced and with some humor and seriousness I only cared that it would work.  Not a problem and they would indicate in new shipment to make sure it worked.  They sent me an email with UPS packing slip that I needed to print off and take the system to UPS and send back.  As soon as they saw pickup they would send the replacement.  Without hesitation the process worked as they promised and they FedEx shipped my new one in one day.  The new one worked great.  I have added a video card for dual displays and added 2 ea 8 gb memory chips.  It shipped with 8 (2 ea 4gb) so with my addition it is now running 24GB.  The most you can install is 4 ea 8GB for a total of 32gb.  The machine screams with power and works great.  I will speak highly of MicroBee as the company that provided the refurbished system.  I believe they are out of Nevada, not for sure, so do not hold me to it.  But they did provide courteous and prompt support and I would buy another refurbished that was provided by them.