Vegan and gluten free food is almost never as good as the "real thing". That being said, this place is definitely a great place in the city for those who have alternative diets. Note: I have only been once.
Regarding being closed on Saturdays, I would say there is a good chance given the neighbourhood that they are being respectful of the Sabbath. I hope people can respect that the Jewish Sabbath is observed from Friday night until Saturday evening, they seem to be doing the same. On the plus side, it means that they are open on Sundays.