Cathay is A-Ok. Good food, good prices and good for groups. Its not a fancy place to eat but the food is always good. They give you tea which is so refreshing to start your meal.
Depending on how busy they are really seems to correlate with the service you get. We have been there with great service and then other times I think they forgot we were even there.
It can get really busy there so make sure to go early. The weekends are the busiest but if you go before 11 you should be able to get seated pretty quick.
All in all- a solid place for decent, well priced dim sum!