We recently spent two nights at the Eclipse Hotel in Hanoi, Vietnam. The hotel was clean and the staff very friendly, but note - THIS IS A VERY BASIC hotel. So we absolutely got was we paid for, but there are certainly nicer places to stay at.
Hanoi in general is a very noisy city, however that didn't affect us too much on the 5th floor.
Breakfast is very basic... forget buffet though - there are about 2 - 3 items you can choose from off a menu, and that is it... no selection and no seconds.
Also, the rooms are not equipped with a safe, so passports and other valuables had to be locked in your suitcase - thus ensure your door and suitcase is locked at all times when staying here.