Bad effect:
1. Poor workmanship can lead to leak and rust.
2. The extra weight carried by the roof will totally upset the drivability of the car because the CG is shifted upwards, more body roll felt.
3. Car is penalised by additional weight, affecting pick up and FC.
4. I have heard a Perdana added the roof and now the car cannot sell because JPJ insist its a illegal kereta potong. He's stuck with the car for life!
5. If it's glass type, u will feel the heat coming into the cabin through your head.
Good effect:
1. Looks cool because most other car on the Malaysian road dun have it.
2. Pop it up a little and can release heat effectively after parking long hour in hot tropical sun.
3. Smoker will love it because its an excellent vent for extracting smokes out from the cabin.