I wanted a replacement for an old HP Compaq 6000 Pro small tower that we've had for maybe 8 years or more.  I've got an EliteDesk 800 G2 tower that I got new a while ago and it's been relliable.  I didn't need a tower setup so this refurbished EliteDesk 800 G2 SFF compact system seemed ideal.  As it happens, the unit I received did have the slim DVD drive that was a popular option, but not every system will have one unless it happened to have come that way for the original owner.  If you want one, it's worth asking.  Very prompt and helpful pre-purchase support.  Very prompt delivery -- shipped on a Monday, arrived on Tuesday.  Follow the instructions to activate Windows, easy to do as long as you can read the product code and type it correctly (it took me two tries to get it right).  Windows Update was happy to apply the relevant updates.  Add the HP Support Assistant and it will do the platform specific Intel updates.  I got the latest firmware from the HP support site and applied it, which was not hard (just a bit scary, if you have flaky power and don't have a UPS, it can be risky to update firmware).  Nice system, runs well, biggest challenge was getting our old Fujitsu scanner installed (Windows didn't recognize it at first but once told to go find the drivers, it did the trick).  Since the old system had lots of stuff hanging around from back in the Windows 7 days, it's good to have a clean start.Excellent bang for the buck, very happy so far.