ive been using crackdat rc and qvault but mostly crackdat, started off with around the same, about a 15. after seeing many questions I began to recognize the type of distinctions that are asked in the questions which allowed me to improve my scores, now im scoring usually around 20-21 but my dat is on tuesday and im pretty nervous about it. I think my day/hours prior to the test will involve at least the couple rc practice tests I have been saving.