We were in Vietnam last year, it was my first time, probably the last time too, i am not saying it's not great, it is, but as a Chinese who was born and lived in a countryside for her longer than childhood time, it is just ok to me, lol, but i do get why all the westerners found it interesting exotic, most importantly, CHEAP. lol, hope you have a great trip ahead of you.
RE: $3 a night. Breakfast included | A hostel in Hanoi