I have only ever caught the railway up and back once, due to the fare being too high for non-Malaysians.
Well, I have just noticed this has changed. You can look at the fare table online: http://www.penanghill.gov.my/index.php/2013-03-27-09-47-27/ticket-fares and you won’t really get the full story.
But today I took a photo of the fare table when I had climbed to the top.
What you will notice is that the fare for adult MM2H holders is now RM8, and for seniors (over 55) RM4. Not RM30 any more!! This is great news!