The question I get about quilted jackets is always the same: are they actually warm enough, or is it all padding and no point? Done properly, yes, warm enough for most of the year, and the trick is in the fill and the stitching pattern, not the thickness you can see.
Where it falls short is anywhere you need real protection from driving rain or proper cold. A quilted jacket with a thin synthetic fill is a three season piece at best, grand for a dry, sharp day, useless the second the weather turns nasty, because most of them aren't built to be soaked through and dried out again without the baffles going lumpy. It's also the wrong choice over anything with volume. Pair it with a full midi skirt or wide palazzo trousers and you end up looking like you're wearing two separate outfits that had an argument, one puffy, one swishy, neither winning. It sits best over something with a cleaner line, straight jeans, a slim dress, trousers with a bit of structure, so the quilting has room to be the texture in the outfit rather than fighting another one. A good one tells you what it is the moment you pick it up. The lining should feel like it's actually attached properly rather than ballooning loose inside the shell, the stitching channels should be even and close enough together that the fill can't migrate and leave you with a flat patch over one shoulder by October. Zips matter more than people expect from something that looks casual, a cheap plastic one will start catching within a month, a proper metal one with a decent pull will still glide after two winters. The outer fabric is the other tell. A nylon with a bit of weight and a slight sheen sheds light rain and doesn't crease if you sit in it on a train for an hour, whereas the thin, papery versions crease like a crisp packet and never quite recover their shape. Press studs or snap buttons should have a bit of resistance, not click open the first time you lean against a doorframe.
Given a bit of care, a quilted jacket gets better with age before it gets worse. The shell softens and loses that slightly stiff, straight off the rail look, which is no bad thing. The fill settles with wear, so a jacket that looked a bit overstuffed in the first week often sits closer to the body by the second winter, which is usually an improvement. What you're watching for later on is the quilting going thin at the elbows and the cuffs turning shiny, that's the sign it's on its way out rather than just broken in.