Saus, open less than one month, is located on Union Street, relatively close to Fanueil Hall, the North End and City Hall. I had eagerly followed the progress of Saus on Twitter, and stopped by the other day for my first taste. And I will be returning.
powdered sugar. The waffle is already sweet, made with Pearl sugar, and the sauce adds even more sweetness. Powdered sugar would simply be overkill, quick to put you into a sugar coma. The waffle is denser than other waffles, being made more with a dough than a batter, and was crispy on the outside, and soft and fluffy inside. The salted caramel was quite delicious, the saltiness helping to offset the sweetness. This is definitely a dessert waffle, not a savory choice.
The servers were very pleasant, welcoming and accomodating, offering free tastes of the dipping sauces. I think prices are reasonable for the quantity and quality of food you receive. My favorite pomme frite restaurant is Pomme Frites, in New York City, and Saus does a very good job though still not as good as Pomme Frites. My personal preference is for a bit of a thicker frite, so you have more of the fluffy potato interior. That certainly though won't prevent me from returning to Saus for their frites.
Plus, consideration has to be given to the fact that Saus is still very new, and still working out all of the kinks. It will be interesting to continue following their progress. I recommend that you check them out, a good spot for a quick snack or dessert.