You need a reservation in order to board. Consult the deadlines here.
If you cancel a reservation after the deadline has expired, you will be charged with 50% of the ticket fee.

Itineraries may vary. Max Mobiel guarantees dropping you off at your workplace within 40 minutes after departure, except in case of traffic jams or road works.

Departure times of buses going back to Dampoort can vary slightly. These buses are likely to make several stops. Maximum driving times will not exceed 40 minutes.