Sherman's Deli & Bakery. The sun was so hot that there were few people walking on the streets so the place looked somewhat deserted from the outside. But once inside, it was hopping. Pastrami is my litmus test for delis, ever since I fell in love with the meat at Katz's in New York City way back when.
One thing I didn't like once I bit into my second half was that the pastrami suddenly got super fatty. I hate biting into stringy fat because it doesn't taste good to me. So I had to deconstruct the sandwich and try to eat only the lean parts. The pickles were good too, complementing the meatiness with its tanginess.
There were several options for mustard and I had the grainy one, which was good. The potato salad that came with it was mayonnaise-y with just the right amount of tartness from the vinegar. It was good.
My companions got a roast beef sandwich and a french dip sandwich with fries and while I didn't taste the sandwiches (the fries were fine but nothing special), they looked decent. I wouldn't really order those anyway because I'm a loyal pastrami-ite. While decent, Langer's remains my favorite deli in LA.