Summary: this has been an extremely reliable home NAS and server for running LAN apps and media transcoders to keep my family happy. any hardware failures (fan, CPU, etc) are easily overcome with off the shelf hardware and are equivalent to supporting any desktop pc without the footprint and noise.
Summary: This thing is WAY faster than the NAS it replaced (an old Linksys no longer supported by Cisco). On our gigabit Ethernet network it's faster than a locally-attached USB 3 flash drive. It's also dead quiet, which was a nice surprise. It looks good, and it's easy to install and remove the hard drives. Setup is easy and quick. Support from NETGEAR is very good. My online submission of a ticking noise from the fan eventually ended up with NETGEAR sending me a new chassis.
Summary: I gave 5 stars due to ease of setup, performance and overall functionality. the PRO 6 unit without drives has allowed me to layout the cost over time when adding larger capacity drives. i built the NAS with 4 (2TB seagate) and 2 (3TB seagate) drives all on sale, all on compatibility list. this has allowed ample storage for my needs as a media server, backup storage for my desktop, and datastore for my vmware projects (iSCSI rocks!). i will be setting up SVN soon.