In hot climates, they're great. Can leave car parked with windows cracked an inch and no need to worry about rain. Also cuts down dust into car. When driving in rain, you get fresh air and no drips or wetness inside the cabin. And the jdm ones flow quite well. The chrome lines up perfect. And depending how much prep work you take, you can keep the gap between doors down to a minimum. I rushed my drivers side, luckily was able to pry it back off and restick it to eliminate a huge gap. Also, they come tinted, so it matches my windows pretty well.

 

I used to have visors on my acura, but i took them off. I originally got them to cover up some of the cheesy window chrome, but eventually got some JDM window trim instead. IMO, the car looks cleaner without the visors but everyone has different tastes and it depends the visors could look good if you have a particular style youre aiming for