Summary: I complain about the price because its relevant to me, however if you fill the box full of enterprise drives and a 10 gigabit interface, it will keep up with SAN systems costing millions of dollars.
Pros: Easy to set up and full of functionality. This SAN/NAS has been very reliable. This box is extremely high performance, especially when you put a 10 gigabit adapter in it. The box is VMware certified and plays well with ESX5.
Cons: I wish it was about 10% cheaper. Also, DO NOT try and use it for the surveillance station option. That functionality is worthless.
Summary: I live far away in middle east, and I find it important to mention that QNAP factory packing is more than excellent. Excellent product, easy to setup, and the sound of fan is not bad at all if the server is placed away from your screen.