I find OSS to be slower than using Nexus and re-enter through security most times. The only time when OSS worked well was when I travelled with my wife back from LGA, but I had to do that as she doesn't have Nexus. We landed during a quiet time, so there was no line up. However, there were three or four agents within 50 feet distance checking our boarding passes three or four times. Like seriously, you expect our BP to be altered three or four times within your line of sight?