I echo a lot of others here; I think it depends on your situation. Every couple is different! I'd never do it in a million years - I'm in my early 20s and I'm still completely ambivalent about getting married ever, lol - but I've got some friends from high school who got married right after. It was weird as hell seeing their engagement and marriage ceremony, but they'd been together a few years, and they've been going strong through ~4 years of marriage so far. It could just as easily end in disaster, sure, but that's life - live and learn! Some people learn, anyway.