I just returned from a 2 day school with Skip Barber at the Arizona Motorsports Park. I hope I get to race there.
It seems to me to be a very well designed track for club racing. The asphalt surface is excellant. The track is wide with good curbing. There are many different types of corners and several designed passing areas (hard braking after a long straight). There is ample paddock area.
While I was there Porsche was conducting a "Driving Experience" for their dealers only and the Barber school was ramping up for a race weekend and doing a school. There was so much room we never saw the Porsche folk (except to sneak in to see the new all carbon fibre Porsche Carrera GT-1 street car). Also the area north of the freeway has developed dramatically and is very nice.
The only flaws are the track is flat, but the run off areas are well groomed and you can go off without hitting anything or hurting yourself. And they have built the track first with minimal amenities. All in all a very nice new track.
Bud