Don't forget that WTC ticket counters close 30 minutes before ferry departure time. Crewmen tend to be uncouth yobs.
Small terminals are always preferable to big terminals.
Ferries also run from here to Stulang Laut and Pasir Gudang in Johore. As the ferry is docking, use your handphone to order a new Port Taxi for Rp15,000. Their boats are small and noisy, but fast. Nice new ferry. Useful if you are making a morning connection to a Sumatra bound ferry.