More like Trek Delay.
We had a booking for 7 people from Wainui (end of the Abel Tasman track) back to Nelson at 1.30pm. The shuttle turned up at 2.10pm and only left at around 2.30pm.
Even though we had the 7 of us, it would have been enough for a chartered service, but instead we were provided with a bus shuttle combining to a total of about 30 passengers, many were going to different places (Nelson was the last stop). Our journey that should have been only 2.5 hours took 4 hours long (excluding waiting time). It is also important to note that we were not allowed to eat and drink on the bus, and with the long travel time, it did not make any food stops or toilet stops, not a pleasant experience after a 5 day hike!
Trek Express also offers a free luggage storage service, which we saw as a plus when we decided to go with them. However to our horror, our clean bags were returned to us dirty (like people had stepped all over it) and wet. We were not warned about the "free service" and that this should be "expected". My husband's clean clothes were wet as a result.
The owner, Rory offered his apologies but was not happy to provide any compensation and simply told us we can choose to go with other shuttle service in the future. His business model seem to run well with one-off foreign customers and so was not worried about customer loyalty.
Nelson Lake Shuttle is also run by the same company.
I would not recommend Trek Express and Nelson Lake Shuttle.