Benchmarks: CrystalDiskMark
We begin our performance examination with CrystalDiskMark and it's clear that in sequential tests the TBS-453A should have no problem saturating the Gigabit Ethernet interface. The dual M.2 SSDs are capable of greater speeds and it would require a premium 10GbE to see what the drives are truly capable of.
Given the bottleneck, the TBS-453A isn't a great deal quicker than the cheaper, hard-disk based DS216j in terms of sequential throughput. It's in the 4K tests that the SSD advantage becomes clear, as the flash-based Qnap is far better suited to dealing with many small transfers.