Pros: I bought this product with little reviews out there on it so I took a chance. I can tell you that I got it, popped my own desktop HDD inside and fired it right up. I'm a little confused as to why there were some configurations by other users. This was literally a plug and play and was already set to RAID 1 so that my data was auto mirrored on the other drive. Also, there's a GREAT copy utility on this product that copies all your data over with outsanding speed. I hooked up an external HDD and it just copied right over with no errors and relatively fast. After that it was time to test streaming (using this as my media server). Streams GREAT no glicthes or anything. I have it plugged in via ethernet to my router, then streaming wirelessly to my BOXEE Box. No lag, nothing. What an awesome product.

Cons: So far none. I'll report back after I've had some time to use it.