With multiple clients, performance was very good, and we didn't notice any performance drops with up to five clients as transfer speeds stabilized at close to 180 MB/s.
We took the screenshots above during the last of our multi-client tests, which is the hardest of them all, in order to show you the stress that was applied to the NAS. CPU usage was moderate while RAM utilization was very low. The CPU was also "running" at a cool 47°C while the hottest HDD was at 39°C, which is a normal temperature for how much stress we put these HDDs under.