I got my passport renewed from DC Embassy too and it was hassel free. They have the form and all the required document in their website. I filled it out, included the fee and my old passport and I had my new passport within a month (I am not sure exactly how long it too..it was done a while ago, but it was not a long wait for sure). There were no errors and no lost documents. I dont think you have anything to worry about if you follow the instructions well.