Summary: I bought mine used with the latest firmware installed. I am also surprized at the bad reviews of this unit. I got the unit, I set it up within 20 minutes and had my drives partitioned and running within the hour. I use it purely for a network redundant storage unit for backup of our desktops and all of my website software.
Summary: I have used a Drobo, a Patriot memory media NAS, and then the D-Link DNS-343. Without a doubt this has been the most reliable unit thus far. I had issues prior with the other units hanging up while trying to stream media from it. I'm using a gigabit router with thick heavy cables, and the computer is hard wired running gigabit too, and each of the other units would just hang. This unit streams flawlessly! I currently have 4 3TB HDD's which it actually doesn't like.
Summary: I needed a NAS that could accommodate 4 SATA drives. This enclosure was priced just right, and online reviews praised its ease of use and flexibility. I have been using this NAS for the past 6 months and have experienced no downtime at all. The initial setup could not be simpler and the integrated OLED display shows you everything you need to know at a glance. This thing is built like a tank.
Summary: I have bought 2 of these and they work without problems... both have 4x Seagate 1.5TB 7200.11, each NAS has a single partition of RAID5. The NAS shuts down the drives when idle, this is very good but I guess all NAS do this. The speed is not very high while transfering files to them (generally 12MB/s), but for me the most important is streaming videos at a good reasonable speed, even blu ray at 1080p stored there works without problems through a gigabit network.
Summary: I purchased this device under a good impression of DNS-323. So far, there is no disappointment at all. It works right out of the box. It took me 15 minutes to install 4 x 2Tb WD Green into it and configured it (RAID 5, IP, e-mail, access for 3 persons)through web interface - no software requires to install.
Summary: I purchased this when it went on sale for $200. I was pleasantly surprised that the firmware was up-to-date. I chose to do a manual install/configuration of the DNS-343 and skipped the disk install completely. I plugged in the NAS box to my router, and I used Firefox to connect and administer the device online (set up the login and passwords). I had the DNS343 up and running in less than 5 minutes. I started to load the bays with HDs.
Summary: I waited for a while before sharing my opinion because I've had a couple other NAS boxes that seemed great out of the box but didn't turn out well after a bit of use. - It's very quick. I haven't done any formal tests but I copy large video files back and forth and I'm quite happy with the speed. - Extremely stable. The only time I've had to reboot was when I updated firmware. - Good solid hardware.
Summary: I bought this without too much research and have spent a lot of time with it to make it sing for me. After a lot of work, I've gotten it to a place where I love this thing. Not too expensive and works great for what I need it to do. Which for me was hold a lot of storage (4 drives), be able to use Time Machine on my Macs (even over wireless), and stream Movies to my ps3.
Summary: There weren't a lot of positive reviews out there but I took a chance and bought this NAS and I am very happy I didn't listen to the bad reviews listed here and another site. This was the cheapest 4 drive NAS I could find and it is from a reputable company and it works great. Since I bought it I see that it has come down in price which makes it even better of a deal.