HI, for example, does not even offer the class. When I moved there, I brought several handguns and then acquired several more over the next 12 or 13 years, all going thru the necessary paperwork and background checks. Did a lot of handgun target shooting. Then the County of HI [the Big Island where I lived] changed the laws. You could not take a handgun outside your physical residence until you took the handgun class. This had nothing to do with concealed carry, just the legal right to take a handgun [unloaded, locked in a case] outside the walls of your house. OK, so I went to sign up for the class. None were being offered because nobody was qualified to teach the class. A couple friends were NRA instructors and a couple more were instructors in the military and a couple more were law enforcement instructors. No good. HI would supply it's own instructors and regardless of your experience or background or any classes you took in other states, you have to take this class in the County of HI. This went on for some time and then they offered the class. The wait list was about a year long and it cost a couple hundred bucks. I said screw it and sold my handguns.
And how about this? HI does not have the Castle Law, which states that if somebody breaks into your home and poses a lethal threat, you may use lethal force to neutralize that threat. In HI, if you are the victim of a home invasion and the crooks put a gun to your head, you may not use lethal force if it is even remotely possible to negotiate with them or comply with their orders or if there is an open door or window for you to escape thru.
And you guys think that CA has restrictive laws?