This is as authentic as it can get for a Nepali Cuisine at least in Pittsburgh. As a fellow Nepali and an avid cook myself - I'm pretty confident about my taste bud when it comes to food. Although, this place serves Indian, Chinese and Japanese - I highly recommend anyone who visits this place to go with the Nepali Menu.
Although some of the items might share some resemblance with Chinese or the Indian Dish - this is far from the truth. The Nepali dish has a certain uniqueness when it comes to flavor.
My highly recommended items on the Nepali Menu would be the Momo(s) either the pan fried or the steamed. They're both home made including the wrapper and the sauce that comes with the Momo is very spicy. So, you might want to request the chef to decrease the amount of spice.
The Thali (Rice, Variety of vegetables, Lentils and meat curry of your choice) was very good. However, the amount of curry spice used were a little more than what I wanted.
Last but not the least - the price is super reasonable. I'm sure they will raise the price as it's popularity grows but at least for now try all you can.