@ittran~ I bought ebooks the first semester and it was way more costly than purchasing them on Amazon. They were great because you could easily look up specific words on assignments, the program has the ability to read to you (though not well) and they also came with the my nursing lab (which you can get separately). Since then I haven't bought them because the expense is just ridiculous!
If I were to do it all over again, I probably wouldn't have bought them. I've gotten by without it for the past two semesters just fine and to tell you the truth, most people don't even read them. We typically only use them for citing or to look up specific items that you don't understand.
Hope that helps! Congrats & Good luck! It will be hard at times, but it will fly by in no time. :)