I had only short stay, but enjoyed it greatly. The owner couple are extraordinarily nice, helpful and friendly people -the most important factor in a homestay like this.
Location is a bit off the centrum, next to a rice field. For me that was perfect; listening the choir of frogs and other sounds of nature in the evening was relaxing and magical. The old town of Hoi An and markets are still within a reasonable walking distance.
This place is not a 5-star hotel with facilities of such, it's a homestay. Keeping that in mind, I can highly recommend La Terazza for accommodation in Hoi An.