I worked for three different bicycle shops over the course of twenty years. I stocked shelves, unloaded trucks, assembled bikes, serviced bikes, sold bikes, set up exercise equipment, delivered bikes and packed bikes for shipment. All three of the shops I worked at stressed careful assembly of bikes from the carton and bikes were individually adjusted for test rides and once again before the final sale. We would ask the customer for feedback and how everything felt to them. It didn't matter if it was a 12" sidewalk bike or a high end road bike, they were all equally important to us. Most of you here are bike savvy so if you buy a bike from a big box store, tear it down and rebuild it. You'll thank yourself.