As other people have stated this is a hidden gem. We wandered in there this afternoon for a drink and ordered an iced coffee. It is the best we have had since being in Vietnam.
We decided to go back this evening for dinner and was amazed. The variety of the menu was great and we opted for Vietnamese food and was not disappointed. In fact the flavours were so good and different from anywhere else we have eaten so far.
You have to walk through the kitchen (which is spotless as is everything in the building), to the river and has very nice view and cooler than most places in Hoi An.
You can even buy a great NZ Marlborough wine for a very reasonable price.
I would highly recomend try this little gem.