It seems like a must do for every tourist, as well as locals, as the place was packed even at 1030 am. There sre plenty of food options such as fried croquettes, snowcrab claw, tofu, chestnuts and other local snacks.
For souvenir hunters, there are several shops selling plateware, umbrellas and the usual fridge magnets, even local rice and yuzu honey.
Do note that you are not supposed to walk about eating - you should eat at the tables provided by the eateries, or stop on the side of the corridor (and do not block store entrances).
From here, you can take an easy walk to the old quarter, where the canals are and where there are cafes and restaurants.