Yes. While you may be seated without one, Sunday brunch is vwry popular and a reservation is highly recommended. Not difficult to get one a day or 2 in advance, but day of can be messy.
It depends on your timing. The later you go, the busier it gets. A reservation will cut down your waiting and guarantee you a table.
What days is brunch served?
Not always, but I would recommend it. The food is spectacular so it gets really busy. We were seated without problem last week, but I don't think that would always be the case.
Thanks! Your answer is awaiting moderation.