I like this just as much as Katz's in NYC. The meat is buttery, seasoned, and tender. I'm not a fan of mustard but the mustard wasn't distracting at all in the sandwich. It also wasn't expensive to boot.
The only negative thing I could think of was the wait in line in the sweltering heat of August.
I would definitely drop by again the next time I'm in Monty.
In short, OMG SO MUCH MEATY MEAT MEAT *swoon*.