Summary: DOA, unfortunately. The drive failed to initialize in two different Windows PCs (GPT or MBR) and with a PartedMagic Live CD. Seatools for Windows crashed on both Windows PCs, and failed to find the drive with the Seatools Live (DOS) CD. Based on the other reviews I'm going to assume mine was just an anomaly, but now I'm not sure whether to order a replacement or try a WD Red.
Summary: Out-of-box failure. Threw in Synology NAS to repair RAID 5 array, only to have boot failure. Finally pulled the drive and NAS booted in degraded mode. Checked out drive with SeaTools and a ton of bad sectors found. May have just gotten unlucky, but be sure to to test prior to adding to the volume in order to avoid the near heart attack I had when the NAS would't boot. Always had uneventful rebuilds previously.
Summary: The price is nice, but I have 2-3 times the failure rate with Seagate drives vs Western Digital. I have a 5 drive RAID6 with Seagate spindles at home, and two 4-drive arrays at work. Over the warranty term, I had 9 replacements on the work array. At home, I've replaced all but one drive. One of the replacements is failing again (going offline repeatedly).