The current timetable has services leaving Frankton at 5.46am and 6.28am with return trips from Auckland departing at 4.42pm and 6.25pm.
Most passengers on the first service said it was an enjoyable and comfortable trip, however one man said the times are all wrong, and if he had driven he would already be in the office.
A second passenger said he was very impressed with the smooth and quiet journey.
One woman caught the first train for fun, despite getting up before dawn to be on board.
She said she was going to now spend the day shopping in Auckland.
The $90 million train service is a five-year trial and includes trips on selected Saturdays, which will be free for SuperGold cardholders.
It is estimated the trains will remove up to 73,000 return car trips between the two cities annually.
- with Newstalk ZB