I always get Tazza D'Oro and Espresso A Mano confused, but in this case it's not really a bad thing considering they're two of my favorite coffee shops in Pittsburgh.
Just recently taking the day to write and enjoy the sun after a long Pittsburgh winter inside Espresso A Mano was very enjoyable. The atmosphere is laid back and there's plenty of space to move around and work, even when the house is full. I just recently discovered that they provide sandwiches which are delivered by the people behind E squared which means they're nothing short of delicious.
The coffee, as always, has a rich flavor and there are many ways to order it depending on your taste as the staff has extensive knowledge in preparing a good cup of coffee (or any variation of). Also, for your convenience, the wifi is free for 2 hours, but you can ask a barista for a code if you need to work beyond that time.