I was skeptical - more than one site and page said this is a MUST to experience. I almost skipped it due to lack of time, but I am adding my voice to the crowd - You Absolutely Must Dine Here When You Are in...Hanoi!
You know how good it is? They only have this dish in the menu. That's it, you can't order anything else.
It will cost around 120-140k dong per person, but you probably won't even be able to consume the entire thing. Fish pieces are fried on the stovetop, and then a large bowl of dill and other greens are added and slow fried until they make a heavenly mix of flavor.
You also get rice noodles, nuts, chili, lemon, bean sprouts to add to your liking.
Can't compare it to anything else I've had anywhere and easily the best meal I had while in HAN.More