I graduated from TAMUCC and took the HESI A2 entrance as well as the required HESI exit exam in order to graduate the program at the end (must have at least 850) and HESI course final exams (must have over 75%).
On the entrance exam, be prepared to take the test using all the knowledge from your prerequisite classes, including generic classes. I recommend not taking the entrance until Microbiology, Anatomy, Physiology are completed. The test covers all subjects, English, Science, Math, etc. There are some review books at amazon and/or barnes and noble that might be give you guide. There is a certain score that you have to have on your entrance exam now in order to be competitive enough to get accepted in the program but it wasn't an unreasonable score.
Also, I strongly recommend you research the HESI exams (all of them required in the classes, some of them count for 75% of the total course grade) and start studying for them as well as NCLEX from the first day of starting nursing school. Nobody told me this upon entering the program so I was surprised to be tested so much according to these types of tests. They are not like any other exam you have ever taken. And I've taken lots of exams, including all of the the GRE and LSAT before I even began nursing school. Some people think the exams are good, some people do not like them. I found them to be very hit or miss for me.
As with anything, study hard and stay the course. Those who can handle the pressure will move forward. Those who cannot will either learn how to handle it or leave the program. It's a really good program though, very glad I chose to go there for nursing school. It will be as good as an education that you choose to make it for yourself. It has definitely served me well as a RN today.