We actually went in search of this restaurant as part of our stay in Amsterdam. We had lunch there but it was clear from other customers that breakfast is the most popular food served. No matter, it was very good and plentiful. The service was good even though they were very busy. It is very comfortable and had some interesting books to peruse while waiting for your food. They have a daily special menu board and a decent menu for a canal side cafe. The meatball sandwich was the size of a baseball and tasted great.
Highly recommend you give them a try. We will be back!