I was here in May for the Aussie V8 round. It is a great venue and the event was wonderful. The one thing I would comment on is the lack of shade at the venue and transport.
There was not much at all, and for the members who did not have main stand or corporate tickets, shade was severely lacking. I would come to more events at the venue, however, shade should be considered when purchasing the type of ticket.
With regard to transport, when tickets first went on sale, the event web site had public transport pick up points around Austin, thus we booked accommodation accordingly, however, this was changed with out notice at a later date, and we found out about it by chance just before the event started, this could have been managed better and for future events public transport should be an option, as the added taxi fare of $50 to $60 dollars one way pending traffic was an added cost which was not planned on.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.