Fittment could be better since my G8's antenna was perfect,but the SHO needs just a slight bit of massaging. Just make sure you thoroughly follow the additional prep time. My GPS and HD and Cesestial radio stations aren't effected in any way. However, Hawaii does not have Sirius /XM so it may be blocking that if I was subscribed, but I'm not. Still overall a great product. I essentially covered over the plastic fantastic factory "turtle shell" cover with the pre painted fin, since I couldn't find a pain in the a$$ free way to remove the shell, I believe to truely do it you have to yank the headliner??? That's what I am thinking, but since I don't have any issues it will just stay there.