Katz has become our regular weekend lunch/brunch spot. Great little deli; I prefer to stick to the corned beef and pastrami-based sandwiches - all great. Potato pancakes are also fantastic. Great service as well - our son looks forward to seeing Gary each week.
The only catch is that Katz is a bit hard to find. Unlike the bulk of the otther restaurants in the Arboretum, Katz is actually located in the small office park at the southeast corner of the Providence / Highway 51 intersection. It is surrounded by spas, doctors offices, and banks. It is at the rear side of the building, not visible from the road.
Stop in and get a sandwich from Katz - it's worth a try.