the only issue was that a temporary windows 8.1 OS was installed when no OS was ordered, I understand they are making a effort to make it easier to users when they turn on their new pc right out of the box. but windows 8 itself makes it difficult for people who prefer to install windows 7 or XP themselves since the hard drive format and security are set up differently. windows 8 makes every effort to prevent users to "downgrade" their OS. so you have to get on with the tech support to walk you through resetting your system's BIOS settings in order to be able to install anything other than windows 8 in your computer.
The computer is excellent.
The system is very fast with regards to performance. The case is really big though, but I guess that allows for adding components easily and gives room to get to components when necessary. System is probably overkill for what the user really needed, but it is a very nice machine nonetheless.