If you worry luggage cannot load, request uber black or uber XL.

Toll is borned by rider

No, the fixed rate from klia is to 1 destination only. Any additional drop off location, consider 2nd trip. Unless you had agreed personally with the driver first.

Like someone mentioned above, the flat RM75 is only for one destination. However if the stop is on the way, you can inform your driver up front and most of the time, they won't mind.

Dont hide this fact and make your rider drop off at say PJ, then go Wangsa Maju cause your driver can report  it after the trip and you will be charged RM75 from KLIA to PJ, and then another normal distance / time fare from PJ to Wangsa Maju.

Basically, don't take advantage of your driver.

Well, I can't speak on behalf of all drivers, but, for me, it really give and takes, it depends how far I need to detour from the existing route, which I usually choose the shortest for the fixed rate ride, unless the shortest route is jammed and make it not economical for me to use, then, I will use fastest route. For your clarification, for fixed rate ride, we are paid by fixed rate also, not by distance nor time, thus, any detour will definitely affect our income. As someone mentioned, please do not take advantage of drivers, as what you expect we drivers do not take advantage of you (just like taxi)

Your cousin name have to be mentioned on policy as driver.