It seems like the people of Regent Square consider this to be the best Thai in Pittsburgh. It definitely is great, I'll just leave it at that.
The inside can handle more people than, say, The Smiling Banana Leaf and the menu is much more expansive. The first time I was here I had their spicy beef soup and it nearly melted my face it was so hot. The ingredients went great together and it was perfect on a cold day.
On my second trip I ordered their pad thai which was just okay. There really wasn't anything special about it and they put way too many peanuts on top.
The service is impeccable and the interior is roomy enough to be comfortable. It gets very busy on the weekends but in the end, that just means its good.