Product creates a different windflow over the top of your Jeep (I have a 4dr Rubi). This product will change the wind flow over your Jeep and cause the wind to beat down on your top. If you use a soft top and install this product don't even think about carrying on a conversation with the passenger at 70 MPH. In around town traffic, it is worse. I suspect the product will work fine with the hard top.
Postive thing is the product is easy to remove.