Cons: I just installed the firmware update, and now my nas will not connect and keeps restarting after about 15 minutes. My wife runs her small business off this nas, and now we need to find a replacement. Needless to say, I hoped this system would haven lasted longer than a year.
Pros: Speaks lots of protocols (NFS, CIFS, AFP), etc., so it's theoretically able to support a variety of clients.
Cons: Was never able to get TimeMachine (AFP) working reliably. A backup would start, run for a few minutes, and then disconnect unsuccessfully (without completing). I was able to see some data transferred, but for whatever reason, our Mac would hangup and abort the backup. Tried both wired + wireless ...
Summary: Running the latest firmware 3.8.1(20121205) at the time of writing. The user interface is nice and very pretty but it stopped responding fairly often and I would have to close the browser and log back in to get it to start responding again.