As I am writing this review I am also answering the additional Yelp specified questions. Yes HARU is fine for children who are who recognize that it is a primarily quiet, adult atmosphere and who like sushi. There is a kids menu but there are more kid-oriented restaurants in Calgary.
We have been regulars here since the doors opened in Mckenzie Towne. The menu is a decent size with familiar favourites; tako yaki, salmon and tuna tataki and some unique twists on the scallop roll (sweet) and the hot kitchen "ika" (BBQ not deep fried). The service is impeccable. Our one critique is that the food has, over the last year, become inconsistent. How much if an item, how it will be presented, what sauce changes just enough to sometimes to disappoint (when looking for a particular item, for example). Overall this restaurant is worth visiting. I personally recommend trying as much as you can on the menu.