Conclusion: Draytek's Vigor 2920n is a high-end networking device for businesses that need a router that can perform business-centric tasks, but average throughput makes it appropriate only for SMBs with low throughput demands.
Pros: Extensive business-class features. Ports on front panel for access when rack-mounted.
Cons: Average throughput at 2.4 GHz. Slightly below average throughput at 5GHz. Interface timed out once in a while.