I find it rather difficult to justify the quality of food using words but here goes;
I'm from New York and I've been to legendary pastrami and corned beef places such as Katz Deli and Carnegie Deli. I think it's safe to say Cleveland has a comparable gem in Mister Brisket.
I had the "Charles Barr" Reuben; it was two slices of rye, pastrami, corned beef, sauerkraut, thousand island dressing and swiss. The pastrami and corned beef was cooked and seasoned perfectly. The sauerkraut was very subtle. Overall the sandwich was one of the best I've ever eaten. It was nothing too crazy like Melt Bar and Grilled next door but it was tasty as hell.
This IS a hole in the wall so don't expect a few tables, silverware and a waiter. Service is great, food is tasty and the prices are just right. What more can you ask for?