If you're good at studying on your own, I'd say do it. Classes are expensive and if you have that discipline, your'e better off saving your money. If you do feel you need a class to help keep you motivated, then read up on the forums here. There's a lot of different classes, and they worked well for some but not for others. I took Manhattan Review
's weekend crash course, and I ended up getting a 750. But I'm sure different peopl had different experiences. Figure out where you are first, and then you'll figure out what you need. GOod luck studying!