I don't think Mom/Pop using any substandard products (depending where you go of course), I think it depends on the company and whos running it and whether they take pride in selling good quality products. I had the windshield in my Ford Tempo replaced by a Mom/Pop shop and I found out later that I got a better price for the same brand of windshield that I would have paid for from a "chain". Just do your research on brands to find out whats the best then seek out the best price/quality workmanship. I don't know where in the US is the best place to go but in Canada the best chain is "Apple Auto Glass" They really do excellent work IMO.