Very quick process. At the first window they took my fingerprints and all of my original documents. After that I had to go to another window window where the consular officer asked a couple of questions pertaining to my marriage. He informed me about my rights in the US and told me that I was approved. Then I went back to the first window and received my original documents back, and I handed over my self addressed stamped envelope to return my passport. In total the process took 45 minutes, including waiting for other visa applicants to finish ahead of me.