Square Villa was by far the best boutique hotel we stayed at on our tour of Vietnam. Don't let the affordable price fool you, this hotel exceeded our expectations completely.
The location is perfect - 5 minute walk to Old Town.
The room was ideal - big, firm bed, comfy pillows, great bathroom and shower, fridge, ice cold air con - everything a traveller needs after a big day of exploring.
The only minor downside was there is no elevator, but given they assist you carrying your luggage up and down the stairs, it wasn't much of an issue.
The host (I never caught her name) was the most hospitable person we have come across. Breakfast every day was more than enough, and you get to select either western or local dishes the night before for the following mornings breakfast (I recommend the Hoi An bread (bahn mi, made locally), banana pancake and omelette) as well as traditional Vietnamese coffee.
In fact, if you ever wanted some ideas on what to do, the host can recommend sights, book them for you, as well as suggest dining locations that aren't frequented by tourists but definitely provide the best local cuisine for an incredibly affordable price.
Organising airport transfers was excellent too.
If you are struggling to choose a place to stay in Hoi An given there are so many options, look no further (we were in your shoes too), this hotel won't let you down.