Yesterday, I took one sample exam by Powerprep's software. My listening is still awful. Though I am continuing to ameliorate my reading comprehension skill, I am not improving in structure section. I am dissatisfied with my preparation. Though I knew that TOEFL exam will not be a piece of cake, I thought it not to be hard either. The software has primitive interface. It switches to very low resolution and reminds me the days when I used to play with some DOS games. There are only two sample tests. I think I don't have the latest version, but may be the latest one is not free of charge.