The DS1819+ offers huge storage capacity potential, which can be further expanded upon with the addition of two Synology DX517 units. The big question, however, is whether it's worth the stiff price as there may be better options out there that are more affordable.
High performance (especially with encrypted transfers; Solid build quality; DSM OS; Btrfs filesystem support (besides EXT4; Four Gigabit Ethernet ports; Quiet operation; Low HDD temperatures; Tool-less installation of HDDs; Fans can be replaced easily; Support for up to forty camera licenses (comes...
Price; C3538 CPU doesn't features a hardware-transcoding engine; No HDMI port; It would be nice to see a Thunderbolt port; Plastic HDD trays have no anti-vibration materials and locks; You cannot format an external disk into NTFS (but NTFS disks are recognized properly