I am 64 years old, and I consider myself an expert at knowing just what makes a good restaurant ""good."" Armstrong's is like an Eat' N Park with larger portions....but no salad bar. I recall a LONG time ago (mid 1960s) when Armstrong's had initially opened for business on Mount Washington (Duquesne Heights) before they relocated to ""The Galleria"", followed by another move to the corner of Grove Rd at Library Rd. Prices were low, service was good, portions were large, and food quality was only average. At present, Armstrong's is largely unchanged.....except prices are less inexpensive now. This place is only slightly above average. I've learned that the most popular eateries are very often undeserving of their popularity and/or notariety. Just chalk it all up to the fact that human beings are just a species of animal, and feed the livestock. (""slop the hogs!"")
Pros: Location, portion size, unpretentious/casual/family dress code.
Cons: Prices, long wait to be seated.