Sad to see such a good place go down hill over the years. I used to be a huge fan of Osmows until my past many experiences of many in which I was "giving them one last chance". Other than the horrible service, they want you in and out of there so fast that your shawarma ends up being either with wrong toppings, wrong spice or pieces of fat and cartilage.
The cashiers look like they should film a segment titled "FML". Diana used to work there (kind Spanish lady) and I would only enjoy on going when she was working.
This is what happens to a small restaurant gets busy and candle handle traffic in a professional and timely matter.
Take advice from an Arabic person himself, save your time and money and go to either Lazeez or Pita & Grill.