My long-time fave for Ethopian in the PGH, the vegetarian sampler is amazing... as long as the injera is fresh. They've also allowed me to be somewhat creative with the menu, picking some of the app options in my veggie sampler (the potato salad is real good).
I've never experienced a wait, which makes me feel that it is one of the best kept secrets in E. Liberty. And with some of the best, fresh vegan eating in the area, there is no good reason that it is a secret (the menu has meat options, too).
Go there, eat with your hands, treat yourself to a cold Meta or St. George (Ethopian Beers), and have yourself a good ol' time.