If you're seeking a no frills, non trendy spot to pickup a quick breakfast or lunch that serves flavorful food Umbrella is a great option in downtown Pittsburgh. I've only been to Umbrella for breakfast once and lunch during a business trip as I sought out a non chain, non bar food atmosphere.
Their breakfast sandwiches are standard but good and I really enjoyed their oxtail dish served sometimes during lunch. The oxtail is mentioned by many Yelpers and it is a must try.
Umbrella will definitely be a "go to" the next time I'm in Pittsburgh.