Transjakarta Busway

Agreed.
Traffic is hell in Jakarta, so using cheap bus services is often a good idea, is always  cheaper, and will probably get you there quicker.

Normally a good idea.... and no worries about finding a parking space.

The busway is cheap, works well (Most of the time), and is generally a lot faster than a car as they have bus lanes other vehicles aren't supposed to use.
The stops are mostly in the middle of the road, meaning you use a footbridge to get to them.

These links give you a lot of information about the services.

http://www.transjakarta.co.id/

Route map page here

http://www.transjakarta.co.id/peta_full.php

The stops are clean and tidy.
The first thing you see is a card controlled gate and a ticket office. If you have a BCA Flazz or any of the Mandiri emoney cards, you simply tap and enter the waiting area. It costs Rp3,500 to get in, and you'll find a TV with service information to make your life easier.

The buses are clean and tidy, reasonably comfortable and there are staff to help you if you have problems and keep the ladies only area free for women and children.
The buses have a PA system to announce the stop.
When you get off, you'll be asked to tap your card again, but that's just to make sure you've paid and stop people sneaking in through the exit, so it doesn't debit your card.