The buffet is great, it's such a deal. It can get quite crowded there on Sundays around lunchtime, and if you go after 2PM they are sometimes out of the more popular offerings that day. I usually try to shoot for 1PM. Another good place if you can catch it in the mornings is Unle Mike's Place. There is also a new place I haven't tried yet for Filipino food, Merlas Kitchen, has anyone else tried it?
Merlas Kitchen
5207 North Kimball Avenue
Chicago, IL 60625
(773) 539-2090
Uncle Mike's Place
1700 W Grand Ave
Chicago, IL 60622
(312) 226-5318
Ruby's has been mentioned a few times before:
http://lthforum.com/bb/viewtopic.php?f=14&t=8712 and
http://lthforum.com/bb/viewtopic.php?f=14&t=18&st=0&sk=t&sd=a&start=30and
http://lthforum.com/bb/viewtopic.php?f=14&t=28631&p=328085#p328085