My experience was a bit of a pain. I also purchased from Coughlin. When I went to DMV (on day 21, this is important) they told me I needed two things to register, the title transferred to California and a smog test. Really? A smog test on a brand new 50 state vehicle. They allowed me to pay my taxes and registration, plus a nice $750 late fee penalty. In Ca you have 20 days to register an out of state vehicle. Never mind that I don't have time to wait 3 hours at DMV and I took the first appointment I could get. Anyway, I started investigating and it turns out that Coughlin had already started the process to transfer the title. Remember, they have sold many, many cars to Ca, they know the process. The smog test was a bit more troubling. I took it to a local shop who apparently have no clue as to how to test one of these. During the dyno process the guy calls me out and says that he's having trouble because the ABS and traction controls are kicking in. He suggests I take it to one of their newer shops who don't dyno. Okay, just a bit more waste of my time. As I'm driving home I start getting error messages on the screen for Stabilitrac and ABS. Thinking they screwed something up I took it to my dealer who had to keep it for 5 days (this was over a weekend) so they could contact and talk to a GM engineer to make sure there was nothing truly wrong. They cleared the codes, test drove and nothing came back on. I've had it back for a few weeks and have seen no issues. I took it to one of the non-dyno smog shops and of course it passed easily. The title transfer has been completed and I should get the plates soon. Overall, I hate Ca. and the BS hoops you have to jump through. At least I'm good for 6 years, by then I should be ready to move to a more vehicle friendly state.