IMHO, the laws for California as they are is a good thing. They are clear-cut, there's no question what the legality or regulations are. Many other states aren't so lucky.
If you have a DOT helmet and a $19 plate, you are not likely to get pulled over during the day. At night, you must make sure you have lights and reflectors.
I've been riding these in California since Feb 2008, I can count on one hand the number of times I've been pulled over, every time was my own fault.
By the way, welcome to the forum!