Every single other cookie/baking sheet I've owned has made that dreaded "bong" sound within minutes of being put in an oven hotter than 300 degrees. It's annoying, it makes the food slide around, and it cannot be good for the pan to warp and unwarp like that. So this time I went looking for professional bakeware. I love Nordic Ware; they make quality stuff without charging you an arm and a leg. These work perfectly. They fit well into my standard home oven (plenty of space around it for proper air circulation), they brown my cookies beautifully on the bottom, and the rolled edge seems pretty sturdy. The only negative thing I will say is the gauge could be a little thicker. I'm used to Nordic Ware products being extremely heavy; and while these are certainly heavier than your average cookie sheet, they are not as heavy as I expected. Batch after batch of holiday cooking doesn't lie, however. Everything has come out perfect, so maybe the gauge isn't such a big deal after all.
Just a side note, whenever I cook something on any cookie/baking sheet, I always cover it in parchment or foil. It makes clean up easier, and spares the pans the greasy, ever-darkening coating of oil otherwise needed. I would suggest it personally.