Pros: Fast set up with (4) WD 3GB Red drives. Once I installed an Intel 1GB NIC, speeds were 100MByte/sec read & write. Using it for backup with my Acronis True Image 2013. Took a little fussing to have that see the Thecus by UNC but got it working without having to load any other software.
Summary: This is a great NAS. It is very quick and I have not encountered any slowdowns or performance degredation. Consistantly able to max out 1GB LAN connection. Feature set for modules could be improved through better interfaces.