Lidia's is an Italian restaurant near downtown Pittsburgh that's been around for quite awhile. It's a massive restaurant so you're sure to be able to find a table at any time any day.
My wife, daughter, and I stopped by on a Saturday for brunch since most other places nearby had a line. Their brunch is $29 a person and comes with unlimited buffet options from salads to breads to desserts. Then you pick an entree. We chose the pasta trio. Waiters came to our table constantly to drop off the three types of pastas. They also had coffee flowing freely into our mugs.
The experience was positive and the food decent, but nothing to write home about. We wouldn't run back.