We visited Pamela's while staying in Pittsburgh for the weekend. I would say it's a must stop for breakfast! You will wait for a table on Sunday, we stopped by around 9am and had to wait about 15-20 minutes. They do move the customers in and out pretty fast.
I had the Chocolate Chip Banana Hotcakes and they were outstanding! It is a very sweet menu item so beware, it melts in your mouth. The ambiance is old time diner with a lot of history on the walls. Make sure you bring CASH!