Pros: * ECC RAM! * compact size * easy access to drives * nice design features, such as included Torx screws (and screwdriver) for drive sleds * mostly cooled with quiet 120mm fan * USB port inside in case you want to use a USB flash drive as a boot drive (which I am, booting FreeBSD) * optional remote management card available * it's cheap for what you get!

Cons: * tiny fan on PSU, increasing noise * the drives are physically accessible while the computer is on but they're not hot swappable * there is no documentation for the remote management card * the virtual media feature of the remote management card doesn't work on Mac OS * it's not silent

Overall Review: I was going to build my own server from scratch and then I found this and bought two of them. Good job, HP! I'm running Ubuntu and FreeBSD on them.

Pros: none

Cons: It doesn't support Mac OS, despite having a Mac icon on the box next to the Windows icon. What's wrong with these people? Email from support: Unfortunately, the PP series would not be able to be used with the Energy Saver for the Mac. Thanks, Jeff Peterson Tech Support CyberPower Systems