Teenager here chiming in, Snapchat is great but kind of slow on my (Android) phone -- It takes like 5 seconds for it to even load who has new stories, and I used to be able to swipe up to show my stats and snap code but now it's a bunch of related/nearby content ("top stories") I don't care about. Ads between stories are kind of annoying but I understand they need to monetize somehow.
It's great for sharing photos and quick texts but no one uses snap maps, the sponsored content is cringe, and I have yet to see spectacles in real life because unsurprisingly, we don't have the money to buy $100+ camera glasses.
I should also add that a lot of my friends do use Instagram stories, but a lot of the time it's just a picture with the text "AMOS: {sc_username}" (AMOS means "add me on Snapchat") so take from that what you will.
