Yeah, in person you don't notice the bubble roof as much since you're close up to it. Looks a lot better than in pictures. Still wouldn't buy one though--I can't abide the pricing and the "Right Between the Boxster and Carrera" marketing.
As for 987 gas mileage, I filled up, went cruising and found that around 75 MPH I was getting about 24 MPG. The 28 MPG score is definitely a 55 to 65 MPH rating.
I usually average out to 16-17 MPG by the time I fill up, according to the computer.