Summary: I bought this a couple of years ago and have been happy with it the whole time. I have it loaded up with two 2TB drives to store all of my music, photos, and movies. The setup is pretty simple if you want it to be. There are a lot of more advanced features that you can set up, but aren't required if all you want is a basic media server that you can access on your home network. I have mine set up so that I can stream movies to my TV via my WiFi BluRay player.
Summary: So this is good product once it's up and running. If you are a novice and don't have any IT background or aren't too savvy get a time capsule from apple. I got it setup quickly but configuration is confusing in some areas especially the remote access stuff. I created a username that was my email address and wondering why when I logged into the remote access site it was saying my device was offline. Netgear support handled it and let me know that it was a bug.
Summary: I have to say I'm a bit of a newbie to NAS but I'm learning. This little box may not be able to do what an $800 unit does, but then again it's not even half that price. I'm learning that the ARM processor limits the amount you can do with this, but it does have support for a few things that are very useful. Plex is supported, but video must be transcoded offline since the processing power is not there to do it on the fly.
Summary: Got this about a year ago now and have actually taken advantage of the X-Raid feature recently. It works as advertised, mirroring or spanning (2) compatible disks. I have mine set up in a mirror configuration in case a hard drive dies. I have all my family pictures, videos, music, etc from the past 15 years on it. Because I went digital (music, pictures, video) so long ago, I have a LOT to store.
Summary: The unit works great and I love the ability to add any USB printer, but I didn't care for the way it is supposed to be able to be added to the domain. After several hours of trying I finally gave up and just used the built in security. It has an interface for backup power supply and that works really well as we lose power a couple times a year. Overall I think this is about as good as it gets.
Summary: I bought the Netgear because of all its add ons. However, I quickly realized that the Duo doesn't run on the x86 intel chip and thus many of the better add ons also don't run on this netgear model. However, I use this NAS box as a backup to my x86 Ultra Plus. It works great and has never given me an issue for how I have used it so I have no complaints there. If you are only looking for storage, this will do an excellent job.