Getting "almost" here is no problem. This is probably one of the most signposted sites in Isaan, if not Thailand. But people complain that the last 500 meter are terrible. The end up at the wat or at the dinosaur site museum.
This is at the end of the day an informative, modern, museum. The other people have is finding their way around once inside the place is much in need of a map or some form of directions to find your way around. It was great having the class of Thai kids who added life to the place. They were quite lively and polite. Congratulations to their teachers.