The big flaw in this for me is your guests need to be Comcast
customers. I do see why they are doing it tho.
Comcast is so bad here, I don't really know many people who have it.
My wife has it at work, simply because they do cable for the
neighborhood. They are seriously looking for another data service. The
TVs in the club house are already on Direct TV, mostly for the sports
package. I think the data in the clubhouse is free right now because
they don't want to use the business and they have DSL knocking on the
door.
Until very recently Comcast up here was getting terrible as well, both
in cable TV and Internet service. Lots of outages on the Internet
connection and weak or no signals for cable TV on many channels.
Then they did the upgrades. The Comcast tech who came to the house told
me that Comcast is slowly upgrading their entire system, nationwide and
also the provided gear to customers. Eventually everyone will be
upgraded to the type of gear he installed at our house.
Since then, the services have been excellent. Faster and stable
Internet and much improved HD TV signal. So, maybe there's hope in the
future down there.