This 'feature' appears to be non-functional (at least for me) as of this morning.
The DNS servers it specifies are not responding to DNS queries (and non-pingable)- making internet browsing a little difficult.
These servers appear to be down/dead to my connection:
204.194.232.200
204.194.234.200
After unchecking the option I rebooted the router and it pulled my ISPs DNS settings - putting me back online...