This model router seems to be capping out at 180-200mb download link speed and with GameFuel enabled and configured, caps out at 4Mb up link speed.
This model router is still working well on my 100/3 ISP service. v1.23 FW loaded.
One of the few D-Link model routers that can be configured for use with two game consoles and see OPEN NAT across the board. I did get OPEN NAT with 3 xbox ones with a DIR-655 Rev B.