We thought that we would give Mezzo a try, since most of the Yelp reviews were positive. Let me start off with the positive parts:
Service was very good.
Good selection of wines by the glass, and reasonable prices.
The food was underwhelming at best, and sometimes disappointing. I would say that the salmon tartar tasted like it was made out of smoked salmon, not fresh. The dressing on the salad was anything but a jalapeƱo vinaigrette - I could have sworn that it came right out of a bottle of Hidden Valley ranch dressing. The chicken was flavorless, although the vegetables that accompanied it were tasty. The cornbread added absolutely nothing to the plate but taking up space. The box of bread that we ordered was average. The complementary cookie that came with the bill tasted like it came out of a box.
I am sure that there are better options in Pittsburgh than this.