I can easily say that the fresh Synology DS213+ impressed me with its features and the overall performance it achieved. It managed to score a very good price/performance ratio because of high transfer-speeds during the real-life tests I conducted, which easily puts it on top of all the other high-end NAS servers I tested in the past. It's still pricey, but you have to consider what this NAS has to offer, and I assure you that its list of features is pretty long.
The DS213+ easily copes with all tasks you will throw at it because of its dual-core processor. The low energy consumption makes it a great candidate for 24/7 usage. Such low power consumption will translate into money saved on your electricity bill. Besides, the DS213+ obviously enjoys great support through a custom-tailored operation system and a plethora of different software packages. Another thing that I liked very much was its updated DiskStation Manager operating system. Version 4.1 comes with many upgrades and a bunch of new features over its predecessor. Two of its most significant changes are that Cloud Station now supports synchronization for two shared folders and its enhanced protection features, which most users will surely appreciate.

To wrap up, I think that the fresh DS213+ fully justifies its price because it packs many features and performs really well. The two disks that this NAS can take will be more than enough for most users. Only in a business environment, where high data redundancy prefers RAID 6, which takes more than two disks, could the lack of more disks be a detrimental factor. But other Synology NAS servers capable of holding many more HHDs can meet the needs of such business-specific scenarios well.