Love it. Love it. This is my go-to place for any hostess gift or neat little Pittsburgh present that you might need. (the website has an online store so you can ship the wonderfulness anywhere) No one can turn down some sweet or savory treats. I have only been to the Strip location.
I can only say amazing things about the peanut butter - chocolate popcorn for a a sweet option. It is PB and chocolate on kettle corn so it is super sweet. Some pieces are just amazing chucks of chocolate and peanut butter. Cherry pick those first. AWESOME.
As for salty, I have tried the Cheddar, Movie theater butter, Garlic Parm, Ranch and many others. The sweet popcorns blow the salty out of the water (but that might be my raging sweet tooth) . Don't underestimate the salty, they make a great pre-dinner or game time snack.
Tips: Check the website for the weekly flavors. They have a set list of kinds: Cheddar, butter, PB and Choc. the weekly flavors are sometimes seasonal, like Popcorn made with Peeps for Easter or Lucky Charms for St. Patty's.
Ask for a sample. They guys that work there are very nice. They make it a great time and are very friendly. You always leave happy.