Eh, it was ok. The hardest part about it is the lack of time.
I'm not so good with Math, so it might take me a bit longer than an average student to do a certain problem, and time isn't a luxury you have. Getting 20-25 mintues for 15+ problems isn't exactly fun.
Oh, and the English part can be difficult because of all the reading you must do. The part where you have to correct sentences or fill in words is a bit annoying. You might read the sentence a couple of times, before figuring out which answer belongs there. And you might be wrong anyway, since a lot of the choices sound like they're the correct answer.
The part that bugged me the most was where you read a long passage and then answered retarded MC questions, because it's the type of questions where you have to go back into the passage. It's a bitch, because once again, you really don't have the time.