Pros: 4 Drives of 3TB makes for huge and cheap storage. Can do all RAID options but 6 and 60. Lots of other good options.

Cons: Power Supply under powered, drops drives because of it.

Overall Review: Has a 235 watt at 250 volt power supply, but at 110 volts, that drops to 60 watts. Not enough to run 4 drives, and barely enough to run 1. Tried with 4 - 3TB drives in a 9 TB RAID 5, and array would not finish building before it dropped a drive or two. Swapped out drives for 500GB. Actually went thru and finished building a 1.5TB RAID 5. Next day, power supply failed. Shipped back to Sans Digital, same issue on return, power supply died again in two day. Went into Frankenstein mode (rather than pay to ship it back to Sans Digital again, and installed a 300 Watt ATX power supply externally (Grounded green #14 wire to chassis with on/off switch to turn off and on). Has run without a hiccup with all 4 - 3TB drives in a 9TB RAID 5 for 4 months with no problems. Plan to do the same thing to my TRM8+B, as I cannot put more than 4 drives in it without it crashing, and it still drops a drive once a week and need to rebuild.