Pros: Software is great. Very simple to use and setup. SHR is raid 5 plus a few bonuses. Comes with cables for the dual nics.

Cons: For $600 the plastic seems a bit flimsy.

Pros: Relatively compact, this fits on a bookshelf or easily in file cabinet drawer (which you should not put it in). I'm running the Synology hybrid RAID without issue for 6 months now. The OS is easy once you get familiar and keeps getting better. Using automated backup for 3 pcs as well as for shared directory and DLNA server. Its much quieter than I expected, which is a pleasant surprise. The fans themselves are whisper quiet (my Netgear R7000 router fan is louder) and as long as your drives aren't loud you should be happy with the lack of noise.

Cons: LED are bright and blinky. I'd like better dust control as its fairly open in the front and there's not a lot of option to install custom dust filters.

Other Thoughts: Truly and pleasantly surprised by how smooth it has been. If you are looking for a home NAS, this is definitely an option to consider.

Pros: It does everything as advertised, user interface is great, had no issues setting it up in an small office, 15 PC's connected to it on the first shot, didnt take the whole weekend to setup like i expected, transferred like 900gb of data over LAN in less than 16 hours. Synology Assistant software was key in making everything work, DSM help is well written and easy to interpret for ppl like me who dont know anything about office networking. I used 4 WD red drives 2 tb each in it. its been connected now for 41 days and no issues yet. (im still waiting and checking everyday) Im very happy.

Cons: None at all.

Pros: Great GUI and a ton of features and install-able add-on's. Added 4 4TB WD Red NASware drives and was happy with the RAID setup and formatting times. Has great network speed with 2 network interfaces and setup in a bonded array!

Cons: NOT SO POWER-FULL!...I setup the entire NAS on a workbench. Took almost a week to migrate and move all the data to new unit. I moved it to a rack environment; just sitting on top a server and pushed it back against the wall. Lost power! Unplugged the power from rear and the proprietary 4-pin power plug came apart! Now after having the unit for almost 2-3 weeks, I am contemplating returning the unit to NewEgg or RMA'ing a power adapter? Why use what seems to be a cheaply made proprietary 4-pin power supply adapter on what seems to be a great NAS device??

Pros: * Powerful, easy to use user interface
* Very quiet
* Low power usage
* Runs Linux under the hood, so power users can customize it
* Fantastic media organizer & DLNA server
* Wide variety of officially provided packages, including Apache HTTPD, dovecot, postfix, cloud servers, GitLab, MariaDB, and more

Cons: * GUIs for configuring some servers (Apache, postfix, dovecot, etc.) are pretty bare-bones; they'll be fine for the average user, but users with more complex needs will have to edit config files by hand... but at least you CAN edit them by hand, so any experienced sysadmin will be able to figure it out.
* The custom Linux distribution provides ash as the shell and only has vi (not vim) as a text editor. Bah!

Other Thoughts: I bought this to replace an aging hand-assembled server running Ubuntu that I was using as a NAS, and I love it. I've got 3x 3 TB HDDs in a RAID5 and a 240 GB SSD as a cache, and I can get read/write speeds of over 100 MB/s on my gigabit network, so it's probably maxing out the link. The GUI does a great job of monitoring system performance and is very customizable when comes to setting up notifications for updates and security events. It supports pretty much any protocol you could want to use to copy files -- SFTP, SMB, AFS, NFS, and more -- and has very detailed permission control for managing users and groups. You can even join it to a Windows or LDAP domain if you have one.

The part that I'm most impressed with is the DLNA server, honestly. I've spent a long time looking for a package that had a good GUI for allowing multiple users to manage a central library, import existing playlists, construct new ones (including smart playlists), and stream the content to remote clients, and until now I had never found one I was satisfied with. Plex comes close, except it requires a subscription fee to use its advanced features, and it can only import iTunes playlists, which is worthless because nobody in my house uses iTunes. This unit does everything I wanted and more; I have no reservations about calling it "totally sweet."

Pros: Easy drive installation, super easy management interface, perfect size, and fast transfer rates.

4x 6TB WD Red in RAID 5 running perfectly in minutes.

Cons: Initial drive optimization took a few hours and performance suffered during that time, but if you setup before bed, the next morning you'll have a perfect NAS.

Other Thoughts: As with all new devices, management console required an update upon initial power up.

Pros: DS415+ is cheap and really fast, Always running around 120MB/S.
Veery small, USB 3, Easy to set up, Accept about any disk, multiple raid support.

Cons: It's not free ?

Pros: Easy to set up
Flexible with different disk sizes
Great apps offer a wide array of capabilities
Active support, updates are frequent

Cons: More costly than alternatives (but more apps)

Other Thoughts: Within a month after buying the rear fan started making a high whining noise. I'm probably going to have to replace it -- it sounds like a bearing or something went out on it.

Pros: Simple, tool-less setup if you use 3.5" drives. Easiest hardware build ever. NAS was up and receiving data in under 30 minutes.

Cons: Phillips screwdriver required for 2.5" drives.

Other Thoughts: I'm loving this NAS. It's my first that was not home-built. The simplicity in setting it up was a huge selling point for me, but it also has all of the complexity that I want for later when I have time to play with it. You really can't go wrong with one of these.

Pros: Easy setup, lots of software options, tool-less design.

Cons: Horrible quality assurance. The reset button that sets everything back to factory settings was completely missing!! I had the unit for a while, initial setup was fine, but when I went to reset the unit to take it to another network and set it up for a backup system, the button was missing entirely. This is no fault of Newegg, the package arrived in pristine condition as usual and the unit itself was completely physically unharmed. How they missed this when it left the factory I haven't a clue.
Synology customer support said they could only send a refurbished unit, but I can't accept that, as it means that someone else already had problems with that one, too. This backup is for medical information, and anything less than a new unit is just a scary proposition.
Luckily H. Moreno at Newegg stepped up to the plate and hit a home run with a prompt RMA promising a new replacement unit. I'm hesitant to work with another Synology product, but Newegg's customer service is undeniably one of the best out there. Thank you Mr. Moreno.

Other Thoughts: Newegg saves the day as usual after Synology drops the ball.