Jakarta Airport Transfers
On exiting customs at the airport, you'll be practically assaulted by taxi touts offering to take you anywhere. These are best avoided, as they will often charge much more than the going rate. The best advice is to get a taxi from the booth just outside the arrival hall. The ride into the city will take anywhere from 45 minutes up to a couple of hours, depending on the time of day and traffic.
The best option by far is to book a car and driver at the Golden Bird counters while still in baggage claim. A division of the highly respected Blue Bird Group taxi service, Golden Bird offers an executive car service using nicer vehicles that ordinary taxis. If there's more than two or three of you, they can also provide vans.