I just disembarked today as well, and it was extremely smooth process. Our group was called about 8:40 AM. We did the airport transfer, but just to pick up a rental car. We were to the airport by 9:30 am and had the rental car by 10:00 am.
At our time there was a long line for the airport transfer. Both the Discovery Princess and HAL Westerdam were using the same buses. If you use a porter, you can bypass that line and go right to the front. We didn't know this when we got the porter, but were thankful.
I also didn't stop when going through customs, just had the passport open to photo page and he just waved me through.
On this sailing the Platinum and Elite disembarkation lounge was in Gigi's.