I finally got to drive a GT1 RWD today. (I plan to buy a GT2.) I only drove surface streets, for about 20-25 minutes. The freeway was backed up, so this was probably as good as I could have managed. This car is exactly what I expected it to be--great!
Despite the lack of freeway, I did momentarily get that silly Stinger grin you see in all the You Tube reviews; when traffic cleared ahead of me, I gassed it for a block-and-a-half, and, my gosh, it really does pin you back into the
seat. Several of you commented on how easy the car is to control, and I totally agree. Cornering felt good, although given traffic, I only was able to push it a couple of times. Don't take this as an insult, as I don't mean it that way--this is as close to my ancient Grand Prix GT in terms of comfort, great ergonomics, good brake feel, and responsiveness, as any car I've tested so far. My current car reincarnated to this century with more power, which is exactly what I've been searching for.
I did get several opportunities to experience the idle stop & go, and it wasn't as annoying as I remembered it from a rental I drove last year (the make and model of which I don't remember, as it deserves). Despite it being a hot day and having the air conditioning running (which is great, by the way), I never really noticed power cut out, but only noticed when it started up again--and then possibly only because I was watching for it.
Since I've sat in the car several times, I was surprised that the rear window doesn't even fill the rear view mirror. Kind of annoying.
I didn't test the sound system. When I got in, the radio was tuned to the local Mexican pop music station, which really doesn't have a strong signal, and I'm hoping the tinny sound was the bad reception or maybe the way they'd tuned it. I wanted to spend the rest of the time asking questions, so I turned it off and didn't get to test it out on my usual weird variety of music. Next time.
After past disappointing experiences with other dealers, I had finally decided to try the Auto Club referral program, which means I was dealing with the fleet office. Unfortunately, that doesn't put an end to the blasted dealer markup, which at this dealer, Kia of Cerritos, is $5000--the low end for dealers I've heard from so far. This puts the total price of the car up at $60k, with tax, etc. I'm going to have to think about this. The white GT2 I'm interested in isn't scheduled to arrive until mid-January, so I have a little time to either get used to the idea, fall for a less expensive car (unlikely), or play the lottery.
The 360º camera came up, and this rep said they were told that the factory had to rush the U.S. cars into production and this was a parts supply problem. Sorry, Canada, but they should have saved those parts for some of us, since we're paying more.
Final interesting point, if it can be believed. The rep told me that they don't know what color the interiors of the white GT2s coming in will be, and he mentioned black, merlot, and brown (!!). I said only black was on the configurator, and he didn't back down--he says they've been told they could come with any of those colors. Have any of you heard anything similar?
In what I hope was a manner that won't sever any future relationship, I blew a gasket. In his response, I detected a slight glimmer of hope that the markup will become negotiable--but only a slight glimmer. Almost immediately after, I got a call from Alhambra, checking to see if I'd been in to test drive--they were the dealer that had failed to have a car prepped for a drive when I had come in, and this is the 3rd person to call checking on whether I'd ever come in--incredibly dysfunctional operation. 
