You cannot bring in ANY food (not even one little cookie) and only 1 sealed bottle of water. Very limited public bathrooms and almost no water fountains (It's Texas and its hot!). No foldout chairs or umbrellas either, (however it seemed this rule was relaxed a bit as I saw some fold-out chairs on Sunday).
Up close track viewing is severely limited by the double fences all around the track and there is NO access to the back straight where all of the passing and heavy braking is done.
With General Admission access on outside of track near turns 2-9, there are only a few porta potty, no public bathrooms, no water fountains, and no shade! However, this is one of the best spots to watch.
Parking is outside the track and far away, so you cannot easily leave, eat/drink, and come back in. RVs are not allowed inside the track either. They have a tram that runs to the parking lots about every 30 minutes or so, but it was never where I was. It always passed me going in the opposite direction.
Food/Merchandise venders were minimal and manufacturers had very basic setups.
I will only go back again if I can obtain the VIP club passes. This gives you access to more bathrooms, unlimited water/beer and food. Plus a team of golf carts that can take you where you want to go.