I open carry my Glock 22 without any problems. If anything, people ask me questions about the legality because they may not know it and are curious. So far, no problems with LE's. I was pulled over one time and i had a passenger. From what i was told... having a firearm in your vehicle is legal as long as it is in a holster and out of your reach (glove box). However, since i had a passenger with me, i could not leave the firearm in the glove because because it is out of my reach, but now in his. And since it's not visible in the glove box, it is considered concealed... therefor my passenger would need a CWL. In this situation, i keep the firearm on my hip, holstered, and unchambered. When i was pulled over, one of the first things i did was turn the vehicle off and remove the magazine from the firearm. I then placed the magazine on the top of the car, then the firearm as well with the slide locked back. I also placed my hands in plain view of the Police Officer. The first thing he said to me was, "I appreciate that," while taking the firearm from the roof. After writing the citation, he had me place the firearm in the trunk (which at the time, i also had my case), and told me to have a good night.
Naturally, some people give me looks, but realize that i'm legally carrying and treat me as they would anyone else. I'm also a little guy as some of you know... so i'm sure to some people, i look like a freakin' kid weilding a pistol.