The 5 star rating is absolutely based on expectations. You know this isn't a Ritz Carlton or even a Hyatt, but for the price and service provided, this place can't be beat.
I do lots of travelling with my toddler and black lab. Not many places accommodate both as well as the La Quinta on University Blvd by the Pittsburgh Airport. My dog (90 lbs) stays free and without a deposit - refundable or non refundable. And when requested, they always provide a crib.
This place isn't top of the line by any stretch, but it is a very comfortable and affordable place to stay for a night or two. For about $80 you get a clean room, breakfast (a step above continental with make your own waffles), and a great pet policy.
Also, I mentioned service. Any time I have ever experienced any issues, the front desk has always treated me very kindly and been super responsive. As a result, I continue to back here about 3-4 times a year when travel necessitates. I highly recommend!