AMAZING! I am a big fan of Trader Joe's anyway--I love that you can get organic produce and quality gourmet ingredients and snacks for a fraction of what other stores (Whole Foods, etc.) would charge.
This location is by far the best in Pittsburgh. I am equidistant to this and the East Liberty store, but I will be frequenting this one from now on for a few reasons: the parking lot is spacious, the store is larger (and the aisles are wider!), and it's in a less congested area of the city--so if you're driving, it's just much more convenient.
I have also found the staff to be very welcoming and proud of their new store--I would be too; it's awesome!