It's fast, but it ain't cheap. LANGER'S in LA....one of the places I grew up in was the MacArthur Park area. Langer's is on the corner of 7th and Alvarado. Not a great area of town, but you learn how to fight off the drunks if you're a kid. The #19 (Pastrami, Russian dressing, and coleslaw) will Fyou up for life. If you need to travel for a bit and not just eat in house or at the "park" (LOL), get the #10 with coleslaw on the side (it's the same sandwich). You don't want to make the bread get soggy and it is some bad ass bread.
Seriously, if you are ever downtown LA and have about $20 for a sandwich you can split, go to Langer's. The pickle you get with it is awesome too.