This antenna main design is for appearance enhancements. Its AM/FM radio reception performance is great for local stations (Satellite Radio/Navigation/Bluetooth not effected). But for some it may not work as well as it worked for others and there could be many factors besides antenna itself. Like most short replacement antennas you may loose some radio reception. This really varies by vehicles and also depends in the area that you live. If you live in a rural area the reception might not be too good. and AM stations may not work well specially in Country side.
As a general rule, strong stations will be fine and weak stations will be reduced. So please consider this before buying. These antennas are made of pure copper and unlike the oem antennas, they are not amplified but look cool. More durable and longer lasting.