Summary: I purchased mine with a pair of 3TB Western Digital HDDs. Installing the drives is a piece of cake. The Qnap automagically sets up a RAID1 volume the first time you fire it up. The instructions are clear. Be aware that the feature that allows you to access your data remotely over the internet doesn't work if you have Time Warner Cable and you use their preconfigured WiFi.
Summary: I have used these type of devices in the past, but the Qnap is one top notch device maybe one of the best ones. It's easy to configure ( only basic settings) and powerful enough to handle everything my family needs. Is fast and reliable. On the negative side, some of the pro settings are difficult to deal with and some routers don't support remote access. I still give this device 5 stars since this is not the device fault.
Summary: This device is AWESOME! I bought 2 3TB drives for it. Installed them when I got it and it has just worked. Without any issues. I have not used all the features yet but I did get the DYDNS working. Works great. I am very happy so far with this purchase.
Summary: Easy to setup, easy to configure. Put 2x3TB hard drives in RAID 1. Detected and setup without issue. The download center works great for large files so I can start a download or torrent and the NAS will do the work for me and I can shut my computer down.