Well, I have to admit that RCN is staying up and running, here in W-Town, better than AT&T ever did in Somerville. And better, actually, than Mediaone (before AT&T) was, too.
We've had one burp in the DHCP that the router didn't pick up; I did a hard restart that time, but in six months that's a pretty good record.
And, note, RCN doesn't have any problem with routers; they just insist that you put a firewall on (so that you can't be used to spam the world like every Korean kindergarten box is doing). All-in-all, really nice folks.