Unless you're in Virginia or some place where radar detectors are illegal, I don't understand why people do the stealth install. Hardwire with the cables hidden, yes, but hiding the unit itself?
OK, maybe if you like your interior to look clean, but police officers who have seen mine during stops pretty much ignore it (the 2 times that has happened, and one pointed to it, and said, "Don't worry, I didn't stop you for speeding.")