Tried aeroline before.
Basically not bad, but find it quite ex.
Pick up point is at Waterfront Hotel. Drop point is at Corus Hotel.
And vice visa.
Corus Hotel is only about 5 minutes walk to the train station and KLCC. Quite inconvenient. I felt just so-so.
From RM179.00++ per room per night now during promo
http://www.corushotelkl.com/
I ever tried to taking a bus from SG and get a return bus ticket from Prutu Raya Bus Station. Of cos, don't do it last minute cos there may be a risk of unable to get a ticket.