This isn't to put anyone off going to Hanoi or Vietnam in general, it's more of a guide of what you should know/be aware of when visiting this city. These are all related to my experience as well.
I couldn't recommend going to Hanoi more if I wanted to. It was a big highlight of my travels in 2017 and I would go back tomorrow if I could. However, not every city/country is a smooth journey and Hanoi definitely has some bumps and cracks along the way. I suggest you continue reading if you are planning on going to Hanoi anytime soon as these will save you a bit of disappointment. These are also things that I wish I was prepared for when entering this chaotic city.