I came here based on the Yelp reviews on a Saturday in the late afternoon. Even though it was already pretty crowded when my friend and I got here, we were able to choose between a few tables.
The table that we chose was directly in front of the door, but very close to a wall electrical plug-in. This worked out pretty well at first until someone opened the door and I got hit with a wave of cold air every single time.
As far as coffee, I got the raspberry latte and it was very very good. I would definitely recommend it to others. The atmosphere was also cool for both people watching and studying/working. They have free secured wi-fi so just make sure to ask for the password.
I wouldn't say this place is an absolute must if I come back to Pittsburgh, but I enjoyed myself despite the cold air from the door.