My new apartment needs the same capability. Dynamic IP which has different lease times, depending on who you talk to. Service is decently reliable, with some people saying good and others saying bad. Has a linux support page, but doesn't officially support it. Dynamic IP with decently long lease times.
Service ranges from decent to awful.
A friend of mine in Watertown has suffered service bad enough that he has a direct phone number to the third tier tech support, and has gotten roughly four free months so far this year. Hasn't bugged me about my LAN, nor any of the other people I know who have LANs. They will make you install on a windows machine. They will let you change the MAC address the modem is bound to. So that's the info I've seen.