Is this a 2.0T or 3.3TT? Given today's crazy market, it's hard to say whether it's good or not. There is only some much you can deduce from numbers and Carfax history. These days, because of high resale value, lots of folks are trading in their cars, so the 2 owners thing might not be a big deal. A lot depends on how the car presents itself when you go look at it. Keep an open mind one way or another.
First thing I look at are the brake rotors. They tell a lot on how the car has been driven. With only 15k, the stock rotors should be smooth and even, without a lot of grooving, which would be a sign the car has been driven hard - more GO almost always end up with more WHOA. Tires tell similar stories too. Assuming they are stock tires, rears with visibly less tread left compared to the front would mean the loud pedal got smashed a lot. More outside edge wear, particularly on the front, meant corners where taken at brisk paces, which in and of itself isn't as big a negative, but can be added to above mentioned signs to get a better idea of what kind of driver the POs were.
If Carfax shows the first owner was registered in Fountain Valley, CA, I would be cautious. In our shopping, I'd come across a lot of earlier G70s that were bought back by Genesis Corporate and titled there for a length of time. Some are used as company mules, others just sat on the lot, but a number were probably dumped in the demo/press fleet. We saw a red one with not that many miles on the odometer but the brake rotors were grooved and scored badly. We walked away... expeditiously.
