Pros: Easy out of the box server; great software and help info; simple setup; tried it thru both Windows and Linux [but is negligible as it is browser based admin]; started with a single 1 TB Seagate Baracuda [which has lasted 3 mos no prob] in a non-RAID config, then added a 1TB WD Caviar Black later and made a RAID-1, which was easy to do with the given software and Synology web guides {Note: have been reading about NOT using a WD 'Green' drive in a RAID config BTW}; design and construction seems quality; plastic case doesn't bother me as the internal metal housing holds the drives securely; port forward your router and have access over the internet is sa-weet!; small footprint; GREAT LITTLE SERVER to learn with, much easier (though not as fun to learn about!!) than loading an old PC with server software...

Cons: A little slow on the transfer rates; doesn't make espresso...

Overall Review: Had a problem only once with it not recognizing a USB disk, but I chalk that up to that disks partitioning, as the 209j has read others just fine...

Pros: Cheap; no software to install; on-board utility intuitive for basic RAID constellations; does the job: tested it with creating a mirrored RAID 1, then booted the freshly mirrored HDD on its own.

Cons: Black: I wish it came in purple, with a yellow racing stripe; you have to rely on software indications of drive failure: the only warning of a broken array [removed drive] is a momentary screen in the boot process that warns you of a "critical state"... for 4000 ms. An on-board alarm for a broken array would be great for those of use using this in a server and won't have that warning at boot up. Also it took approx 7.5 hrs to mirror two 1TB drives. The Set-up utility has an option for 'online' (normal boot up and copying happens in the background) or 'offline' (sit and watch the cursor spin for 7.5 hrs) copying.

Overall Review: At this point I would buy another one. From Newegg as well...