Most of the raved psychics on here I have never tried. But be aware that unscrupulous phone lines, e.g: California Psychics, Keen, Michelle Knight etc only post positive reviews despite the dross they recruit.
And also they just give you a limited time to review. During that time, you don't know if your prediction will happen. When the due date comes and goes, then you are not allowed to write a review. That's why we come here
At least, I am sure Kasamba does not publish poor reviews and Keen deletes it. Once I put a negative review for QofC and a few days later found it gone.