I've been mounting all my RD in roughly that location for years and years. Usually on the passenger side though. And sometimes I squeeze it between the ceiling console and the end of the visor. Depends on the size of the Vehicle and the car. I like it being completely out of site during a pull over event or prying eyes when parked. It also keeps it from baking in the sun. I never worry about taking it down. Even if rear laser suffered some, I don't care and I don't believe it does. If there are subtle differences in locations for radar sensitivity I would argue this is the ideal location for front radar sensitivity.
I have a ford explore It looks to have a clear viewIn order to maximize your protection from the rear, be sure that the RD has a clear **and level** line of sight view out the back window. Some vehicles have low rear window profiles such that a high mounting up front will somewhat negate a level line of sight from the detector horizontally out the rear.