Summary: I ended up being able to use this unit for its intended purpose once I upgraded to a multiseat quickbooks. but that is not the fault of this unit, that is a quickbooks issue. that being said, we use this everyday. it is a great unit. I am actually considering getting one for at home.
Summary: Amazing product! I've had this NAS running for nearly two years now with zero issues. I use it for my Wife's small business and it supports her and a full-time employee. They use it for backup, file storage and sharing every day. The NAS runs quiet and is easy to configure. The latest firmware (4.0.2) looks really nice as well. QNAP is catering to the late majority and offering a clean and easy to use interface.
Summary: Purchased QNAP TS-469-PRO-US NAS and 4 Western Digital Red WD10EFRX drives, to be used on my personal vmware cluster. I used to own a Iomega StorCenter ix4-200d, but the HDs in the IoMega would die constantly. Drives bolted into chassis and came online without a problem. Drives ran quietly, and were immediately identified by the QNAP NAS. This combination of NAS and HDs seems to work flawlessly as of 2 months into my purchase. The WD10EFRX drives are quiet, and run cool.